28825642 has 8 divisors (see below), whose sum is σ = 45781956. Its totient is φ = 13564992.

The previous prime is 28825619. The next prime is 28825661. The reversal of 28825642 is 24652882.

It can be written as a sum of positive squares in 2 ways, for example, as 27657081 + 1168561 = 5259^2 + 1081^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423873 + ... + 423940.

Almost surely, 2^28825642 is an apocalyptic number.

28825642 is a deficient number, since it is larger than the sum of its proper divisors (16956314).

28825642 is a wasteful number, since it uses less digits than its factorization.

28825642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847832.

The product of its digits is 61440, while the sum is 37.

The square root of 28825642 is about 5368.9516667595. The cubic root of 28825642 is about 306.6147168355.

The spelling of 28825642 in words is "twenty-eight million, eight hundred twenty-five thousand, six hundred forty-two".