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28196029 = 233121013
BaseRepresentation
bin110101110001…
…1110010111101
31222001111200101
41223203302331
524204233104
62444201101
7461443111
oct153436275
958044611
1028196029
1114a09104
129539191
135ac2b54
143a5d741
15271e5a4
hex1ae3cbd

28196029 has 4 divisors (see below), whose sum is σ = 28317276. Its totient is φ = 28074784.

The previous prime is 28196027. The next prime is 28196087. The reversal of 28196029 is 92069182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15960025 + 12236004 = 3995^2 + 3498^2 .

It is a cyclic number.

It is not a de Polignac number, because 28196029 - 21 = 28196027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28196023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60274 + ... + 60739.

It is an arithmetic number, because the mean of its divisors is an integer number (7079319).

Almost surely, 228196029 is an apocalyptic number.

It is an amenable number.

28196029 is a deficient number, since it is larger than the sum of its proper divisors (121247).

28196029 is a wasteful number, since it uses less digits than its factorization.

28196029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121246.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 28196029 is about 5309.9933144967. The cubic root of 28196029 is about 304.3658921080.

The spelling of 28196029 in words is "twenty-eight million, one hundred ninety-six thousand, twenty-nine".

Divisors: 1 233 121013 28196029