78511372 has 12 divisors (see below), whose sum is σ = 145477080. Its totient is φ = 36946496.

The previous prime is 78511361. The next prime is 78511403. The reversal of 78511372 is 27311587.

It is a super-3 number, since 3×78511372³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 577222 + ... + 577357.

It is an arithmetic number, because the mean of its divisors is an integer number (12123090).

Almost surely, 2^78511372 is an apocalyptic number.

It is an amenable number.

78511372 is a deficient number, since it is larger than the sum of its proper divisors (66965708).

78511372 is a wasteful number, since it uses less digits than its factorization.

78511372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154600 (or 1154598 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The square root of 78511372 is about 8860.6643091813. The cubic root of 78511372 is about 428.1975606994.

The spelling of 78511372 in words is "seventy-eight million, five hundred eleven thousand, three hundred seventy-two".