28157734 has 64 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 11232000.

The previous prime is 28157719. The next prime is 28157737. The reversal of 28157734 is 43775182.

It is a junction number, because it is equal to n+sod(n) for n = 28157693 and 28157702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531252 + ... + 531304.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^28157734 is an apocalyptic number.

28157734 is a deficient number, since it is larger than the sum of its proper divisors (24096986).

28157734 is a wasteful number, since it uses less digits than its factorization.

28157734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its digits is 47040, while the sum is 37.

The square root of 28157734 is about 5306.3861525524. The cubic root of 28157734 is about 304.2280361399.

The spelling of 28157734 in words is "twenty-eight million, one hundred fifty-seven thousand, seven hundred thirty-four".