28862280 has 48 divisors (see below), whose sum is σ = 93803580. Its totient is φ = 7696512.

The previous prime is 28862261. The next prime is 28862293. The reversal of 28862280 is 8226882.

28862280 is a `hidden beast` number, since 28 + 8 + 622 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27436644 + 1425636 = 5238^2 + 1194^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39727 + ... + 40446.

Almost surely, 2^28862280 is an apocalyptic number.

28862280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28862280 is an abundant number, since it is smaller than the sum of its proper divisors (64941300).

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

28862280 is a wasteful number, since it uses less digits than its factorization.

28862280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80190 (or 80183 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 28862280 is about 5372.3626087598. The cubic root of 28862280 is about 306.7445664315.

The spelling of 28862280 in words is "twenty-eight million, eight hundred sixty-two thousand, two hundred eighty".