28025634 has 32 divisors (see below), whose sum is σ = 68987520. Its totient is φ = 7391232.

The previous prime is 28025633. The next prime is 28025659. The reversal of 28025634 is 43652082.

It is a super-2 number, since 2×28025634² = 1570872322203912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28025633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25119 + ... + 26210.

It is an arithmetic number, because the mean of its divisors is an integer number (2155860).

Almost surely, 2^28025634 is an apocalyptic number.

28025634 is an abundant number, since it is smaller than the sum of its proper divisors (40961886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28025634 is a wasteful number, since it uses less digits than its factorization.

28025634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51354.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28025634 is about 5293.9242533304. The cubic root of 28025634 is about 303.7515354966.

The spelling of 28025634 in words is "twenty-eight million, twenty-five thousand, six hundred thirty-four".