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28233142 = 272016653
BaseRepresentation
bin110101110110…
…0110110110110
31222010101120221
41223230312312
524211430032
62445044554
7461656240
oct153546666
958111527
1028233142
1114a33a83
12955675a
135b06a02
143a6d090
15272a597
hex1aecdb6

28233142 has 8 divisors (see below), whose sum is σ = 48399696. Its totient is φ = 12099912.

The previous prime is 28233131. The next prime is 28233143. The reversal of 28233142 is 24133282.

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

It is a super-2 number, since 2×282331422 = 1594220614384328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28233143) 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, 1008313 + ... + 1008340.

It is an arithmetic number, because the mean of its divisors is an integer number (6049962).

Almost surely, 228233142 is an apocalyptic number.

28233142 is a deficient number, since it is larger than the sum of its proper divisors (20166554).

28233142 is a wasteful number, since it uses less digits than its factorization.

28233142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016662.

The product of its digits is 2304, while the sum is 25.

The square root of 28233142 is about 5313.4868024678. The cubic root of 28233142 is about 304.4993740118.

The spelling of 28233142 in words is "twenty-eight million, two hundred thirty-three thousand, one hundred forty-two".

Divisors: 1 2 7 14 2016653 4033306 14116571 28233142