28153572 has 24 divisors (see below), whose sum is σ = 65790816. Its totient is φ = 9370368.

The previous prime is 28153537. The next prime is 28153583. The reversal of 28153572 is 27535182.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9268 + ... + 11924.

It is an arithmetic number, because the mean of its divisors is an integer number (2741284).

Almost surely, 2^28153572 is an apocalyptic number.

It is an amenable number.

28153572 is an abundant number, since it is smaller than the sum of its proper divisors (37637244).

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

28153572 is a wasteful number, since it uses less digits than its factorization.

28153572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547 (or 3545 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 28153572 is about 5305.9939690882. The cubic root of 28153572 is about 304.2130460667.

The spelling of 28153572 in words is "twenty-eight million, one hundred fifty-three thousand, five hundred seventy-two".