72387912 has 32 divisors (see below), whose sum is σ = 182767680. Its totient is φ = 23889600.

The previous prime is 72387911. The next prime is 72387941. The reversal of 72387912 is 21978327.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (72387911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12508 + ... + 17355.

It is an arithmetic number, because the mean of its divisors is an integer number (5711490).

Almost surely, 2^72387912 is an apocalyptic number.

It is an amenable number.

72387912 is an abundant number, since it is smaller than the sum of its proper divisors (110379768).

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

72387912 is a wasteful number, since it uses less digits than its factorization.

72387912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29973 (or 29969 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 72387912 is about 8508.1086029740. The cubic root of 72387912 is about 416.7625467529.

The spelling of 72387912 in words is "seventy-two million, three hundred eighty-seven thousand, nine hundred twelve".