78743472 has 40 divisors (see below), whose sum is σ = 209986560. Its totient is φ = 25400640.

The previous prime is 78743459. The next prime is 78743479. The reversal of 78743472 is 27434787.

It is a super-2 number, since 2×78743472² = 12401068765229568, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (78743479) 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, 24972 + ... + 27947.

It is an arithmetic number, because the mean of its divisors is an integer number (5249664).

Almost surely, 2^78743472 is an apocalyptic number.

It is an amenable number.

78743472 is an abundant number, since it is smaller than the sum of its proper divisors (131243088).

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

78743472 is a wasteful number, since it uses less digits than its factorization.

78743472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52961 (or 52955 counting only the distinct ones).

The product of its digits is 263424, while the sum is 42.

The square root of 78743472 is about 8873.7518558950. The cubic root of 78743472 is about 428.6190999670.

The spelling of 78743472 in words is "seventy-eight million, seven hundred forty-three thousand, four hundred seventy-two".