72643374 has 12 divisors (see below), whose sum is σ = 157394016. Its totient is φ = 24214452.

The previous prime is 72643369. The next prime is 72643379. The reversal of 72643374 is 47334627.

It is a happy number.

72643374 is a `hidden beast` number, since 7 + 2 + 643 + 3 + 7 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (72643369) and next prime (72643379).

It is a super-2 number, since 2×72643374² = 10554119572207752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72643379) 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 5 ways as a sum of consecutive naturals, for example, 2017854 + ... + 2017889.

It is an arithmetic number, because the mean of its divisors is an integer number (13116168).

Almost surely, 2^72643374 is an apocalyptic number.

72643374 is an abundant number, since it is smaller than the sum of its proper divisors (84750642).

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

72643374 is a wasteful number, since it uses less digits than its factorization.

72643374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035751 (or 4035748 counting only the distinct ones).

The product of its digits is 84672, while the sum is 36.

The square root of 72643374 is about 8523.1082358492. The cubic root of 72643374 is about 417.2522325425.

It can be divided in two parts, 726 and 43374, that added together give a square (44100 = 210²).

The spelling of 72643374 in words is "seventy-two million, six hundred forty-three thousand, three hundred seventy-four".