72000990 has 24 divisors (see below), whose sum is σ = 187202808. Its totient is φ = 19200240.

The previous prime is 72000989. The next prime is 72000991. The reversal of 72000990 is 9900027.

It is an interprime number because it is at equal distance from previous prime (72000989) and next prime (72000991).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72000991) 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, 399916 + ... + 400095.

It is an arithmetic number, because the mean of its divisors is an integer number (7800117).

Almost surely, 2^72000990 is an apocalyptic number.

72000990 is an abundant number, since it is smaller than the sum of its proper divisors (115201818).

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

72000990 is a wasteful number, since it uses less digits than its factorization.

72000990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800024 (or 800021 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 72000990 is about 8485.3397103475. The cubic root of 72000990 is about 416.0186713451.

The spelling of 72000990 in words is "seventy-two million, nine hundred ninety", and thus it is an aban number.