28162840 has 32 divisors (see below), whose sum is σ = 64002960. Its totient is φ = 11152000.

The previous prime is 28162819. The next prime is 28162909. The reversal of 28162840 is 4826182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555 + ... + 7525.

Almost surely, 2^28162840 is an apocalyptic number.

28162840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28162840 is an abundant number, since it is smaller than the sum of its proper divisors (35840120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28162840 is a wasteful number, since it uses less digits than its factorization.

28162840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083 (or 7079 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28162840 is about 5306.8672491405. The cubic root of 28162840 is about 304.2464241544.

The spelling of 28162840 in words is "twenty-eight million, one hundred sixty-two thousand, eight hundred forty".