78344072 has 16 divisors (see below), whose sum is σ = 153282240. Its totient is φ = 37468816.

The previous prime is 78344047. The next prime is 78344081. The reversal of 78344072 is 27044387.

It is a super-2 number, since 2×78344072² = 12275587235082368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212708 + ... + 213075.

It is an arithmetic number, because the mean of its divisors is an integer number (9580140).

Almost surely, 2^78344072 is an apocalyptic number.

It is an amenable number.

78344072 is a deficient number, since it is larger than the sum of its proper divisors (74938168).

78344072 is a wasteful number, since it uses less digits than its factorization.

78344072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425812 (or 425808 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 78344072 is about 8851.2186731546. The cubic root of 78344072 is about 427.8931954653.

The spelling of 78344072 in words is "seventy-eight million, three hundred forty-four thousand, seventy-two".