72259990 has 64 divisors (see below), whose sum is σ = 147044160. Its totient is φ = 25555200.

The previous prime is 72259987. The next prime is 72259991. The reversal of 72259990 is 9995227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72259991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 811866 + ... + 811954.

It is an arithmetic number, because the mean of its divisors is an integer number (2297565).

Almost surely, 2^72259990 is an apocalyptic number.

72259990 is an abundant number, since it is smaller than the sum of its proper divisors (74784170).

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

72259990 is a wasteful number, since it uses less digits than its factorization.

72259990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 72259990 is about 8500.5876267468. The cubic root of 72259990 is about 416.5169047555.

It can be divided in two parts, 72 and 259990, that added together give a palindrome (260062).

The spelling of 72259990 in words is "seventy-two million, two hundred fifty-nine thousand, nine hundred ninety".