78169320 has 64 divisors (see below), whose sum is σ = 260568000. Its totient is φ = 20844864.

The previous prime is 78169303. The next prime is 78169327. The reversal of 78169320 is 2396187.

It is a super-2 number, since 2×78169320² = 12220885178524800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (78169327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35110 + ... + 37269.

It is an arithmetic number, because the mean of its divisors is an integer number (4071375).

Almost surely, 2^78169320 is an apocalyptic number.

It is an amenable number.

78169320 is an abundant number, since it is smaller than the sum of its proper divisors (182398680).

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

78169320 is a wasteful number, since it uses less digits than its factorization.

78169320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72399 (or 72389 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 78169320 is about 8841.3415271666. The cubic root of 78169320 is about 427.5748099304.

The spelling of 78169320 in words is "seventy-eight million, one hundred sixty-nine thousand, three hundred twenty".