72387774 has 12 divisors (see below), whose sum is σ = 156840216. Its totient is φ = 24129252.

The previous prime is 72387773. The next prime is 72387781. The reversal of 72387774 is 47778327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72387773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2010754 + ... + 2010789.

It is an arithmetic number, because the mean of its divisors is an integer number (13070018).

Almost surely, 2^72387774 is an apocalyptic number.

72387774 is an abundant number, since it is smaller than the sum of its proper divisors (84452442).

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

72387774 is a wasteful number, since it uses less digits than its factorization.

72387774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021551 (or 4021548 counting only the distinct ones).

The product of its digits is 460992, while the sum is 45.

The square root of 72387774 is about 8508.1004930595. The cubic root of 72387774 is about 416.7622819146.

The spelling of 72387774 in words is "seventy-two million, three hundred eighty-seven thousand, seven hundred seventy-four".