72381492 has 24 divisors (see below), whose sum is σ = 187656000. Its totient is φ = 24127128.

The previous prime is 72381481. The next prime is 72381493. The reversal of 72381492 is 29418327.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72381493) 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, 334992 + ... + 335207.

It is an arithmetic number, because the mean of its divisors is an integer number (7819000).

Almost surely, 2^72381492 is an apocalyptic number.

It is an amenable number.

72381492 is an abundant number, since it is smaller than the sum of its proper divisors (115274508).

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

72381492 is a wasteful number, since it uses less digits than its factorization.

72381492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670212 (or 670204 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 72381492 is about 8507.7313074638. The cubic root of 72381492 is about 416.7502256596.

It can be divided in two parts, 723 and 81492, that added together give a triangular number (82215 = T₄₀₅).

The spelling of 72381492 in words is "seventy-two million, three hundred eighty-one thousand, four hundred ninety-two".