72883890 has 24 divisors (see below), whose sum is σ = 189498348. Its totient is φ = 19435680.

The previous prime is 72883847. The next prime is 72883897. The reversal of 72883890 is 9838827.

It can be written as a sum of positive squares in 2 ways, for example, as 71723961 + 1159929 = 8469^2 + 1077^2 .

It is a super-2 number, since 2×72883890² = 10624122843064200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (72883897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404821 + ... + 405000.

Almost surely, 2^72883890 is an apocalyptic number.

72883890 is an abundant number, since it is smaller than the sum of its proper divisors (116614458).

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

72883890 is a wasteful number, since it uses less digits than its factorization.

72883890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809834 (or 809831 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 72883890 is about 8537.2062174929. The cubic root of 72883890 is about 417.7122207433.

The spelling of 72883890 in words is "seventy-two million, eight hundred eighty-three thousand, eight hundred ninety".