28754531 has 16 divisors (see below), whose sum is σ = 34219584. Its totient is φ = 23890944.

The previous prime is 28754471. The next prime is 28754549. The reversal of 28754531 is 13545782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28754531 - 2²² = 24560227 is a prime.

It is a super-2 number, since 2×28754531² = 1653646106059922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28754491 and 28754500.

It is not an unprimeable number, because it can be changed into a prime (28754731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2255 + ... + 7911.

It is an arithmetic number, because the mean of its divisors is an integer number (2138724).

Almost surely, 2^28754531 is an apocalyptic number.

28754531 is a deficient number, since it is larger than the sum of its proper divisors (5465053).

28754531 is a wasteful number, since it uses less digits than its factorization.

28754531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710.

The product of its digits is 33600, while the sum is 35.

The square root of 28754531 is about 5362.3251486645. The cubic root of 28754531 is about 306.3623763075.

The spelling of 28754531 in words is "twenty-eight million, seven hundred fifty-four thousand, five hundred thirty-one".