28087474 has 8 divisors (see below), whose sum is σ = 42154668. Its totient is φ = 14035920.

The previous prime is 28087469. The next prime is 28087487. The reversal of 28087474 is 47478082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24571849 + 3515625 = 4957^2 + 1875^2 .

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, 3084 + ... + 8104.

Almost surely, 2^28087474 is an apocalyptic number.

28087474 is a deficient number, since it is larger than the sum of its proper divisors (14067194).

28087474 is a wasteful number, since it uses less digits than its factorization.

28087474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7820.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 28087474 is about 5299.7616927556. The cubic root of 28087474 is about 303.9747858243.

It can be divided in two parts, 28087 and 474, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28087474 in words is "twenty-eight million, eighty-seven thousand, four hundred seventy-four".