72885990 has 32 divisors (see below), whose sum is σ = 180960480. Its totient is φ = 18765824.

The previous prime is 72885983. The next prime is 72885997. The reversal of 72885990 is 9958827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72885983) and next prime (72885997).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72885997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41019 + ... + 42758.

It is an arithmetic number, because the mean of its divisors is an integer number (5655015).

Almost surely, 2^72885990 is an apocalyptic number.

72885990 is an abundant number, since it is smaller than the sum of its proper divisors (108074490).

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

72885990 is a wasteful number, since it uses less digits than its factorization.

72885990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83816.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 72885990 is about 8537.3292076621. The cubic root of 72885990 is about 417.7162325454.

The spelling of 72885990 in words is "seventy-two million, eight hundred eighty-five thousand, nine hundred ninety".