28025537 has 8 divisors (see below), whose sum is σ = 29723616. Its totient is φ = 26332992.

The previous prime is 28025533. The next prime is 28025561. The reversal of 28025537 is 73552082.

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

It is a cyclic number.

It is not a de Polignac number, because 28025537 - 2² = 28025533 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28025533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14078 + ... + 15944.

It is an arithmetic number, because the mean of its divisors is an integer number (3715452).

Almost surely, 2^28025537 is an apocalyptic number.

It is an amenable number.

28025537 is a deficient number, since it is larger than the sum of its proper divisors (1698079).

28025537 is a wasteful number, since it uses less digits than its factorization.

28025537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 28025537 is about 5293.9150918767. The cubic root of 28025537 is about 303.7511850564.

The spelling of 28025537 in words is "twenty-eight million, twenty-five thousand, five hundred thirty-seven".