28688362 has 4 divisors (see below), whose sum is σ = 43032546. Its totient is φ = 14344180.

The previous prime is 28688323. The next prime is 28688371. The reversal of 28688362 is 26388682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15358561 + 13329801 = 3919^2 + 3651^2 .

It is a super-2 number, since 2×28688362² = 1646044228486088, 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, 7172089 + ... + 7172092.

Almost surely, 2^28688362 is an apocalyptic number.

28688362 is a deficient number, since it is larger than the sum of its proper divisors (14344184).

28688362 is a wasteful number, since it uses less digits than its factorization.

28688362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14344183.

The product of its digits is 221184, while the sum is 43.

The square root of 28688362 is about 5356.1517902315. The cubic root of 28688362 is about 306.1271987453.

The spelling of 28688362 in words is "twenty-eight million, six hundred eighty-eight thousand, three hundred sixty-two".