78073172 has 12 divisors (see below), whose sum is σ = 138358080. Its totient is φ = 38542296.

The previous prime is 78073153. The next prime is 78073181. The reversal of 78073172 is 27137087.

It is a super-2 number, since 2×78073172² = 12190840372283168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 123218 + ... + 123849.

It is an arithmetic number, because the mean of its divisors is an integer number (11529840).

Almost surely, 2^78073172 is an apocalyptic number.

It is an amenable number.

78073172 is a deficient number, since it is larger than the sum of its proper divisors (60284908).

78073172 is a wasteful number, since it uses less digits than its factorization.

78073172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247150 (or 247148 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 78073172 is about 8835.9024440065. The cubic root of 78073172 is about 427.3994328149.

The spelling of 78073172 in words is "seventy-eight million, seventy-three thousand, one hundred seventy-two".