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28835031 = 323417899
BaseRepresentation
bin110110111111…
…1110011010111
32000020222020010
41231333303113
524340210111
62510011303
7500044101
oct155776327
960228203
1028835031
1115305205
1297a6b33
135c87964
143b88571
1527e8aa6
hex1b7fcd7

28835031 has 8 divisors (see below), whose sum is σ = 40118400. Its totient is φ = 18387512.

The previous prime is 28835029. The next prime is 28835033. The reversal of 28835031 is 13053882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28835029) and next prime (28835033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28835031 - 21 = 28835029 is a prime.

It is a super-2 number, since 2×288350312 = 1662918025541922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28835031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28835033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208881 + ... + 209018.

It is an arithmetic number, because the mean of its divisors is an integer number (5014800).

Almost surely, 228835031 is an apocalyptic number.

28835031 is a deficient number, since it is larger than the sum of its proper divisors (11283369).

28835031 is a wasteful number, since it uses less digits than its factorization.

28835031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417925.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 28835031 is about 5369.8259748338. The cubic root of 28835031 is about 306.6480030912.

The spelling of 28835031 in words is "twenty-eight million, eight hundred thirty-five thousand, thirty-one".

Divisors: 1 3 23 69 417899 1253697 9611677 28835031