28418788 has 6 divisors (see below), whose sum is σ = 49732886. Its totient is φ = 14209392.

The previous prime is 28418779. The next prime is 28418791. The reversal of 28418788 is 88781482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21977344 + 6441444 = 4688^2 + 2538^2 .

It is a super-2 number, since 2×28418788² = 1615255022777888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3552345 + ... + 3552352.

Almost surely, 2^28418788 is an apocalyptic number.

It is an amenable number.

28418788 is a deficient number, since it is larger than the sum of its proper divisors (21314098).

28418788 is a wasteful number, since it uses less digits than its factorization.

28418788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104701 (or 7104699 counting only the distinct ones).

The product of its digits is 229376, while the sum is 46.

The square root of 28418788 is about 5330.9274990380. The cubic root of 28418788 is about 305.1653246850.

The spelling of 28418788 in words is "twenty-eight million, four hundred eighteen thousand, seven hundred eighty-eight".