78378672 has 40 divisors (see below), whose sum is σ = 203205744. Its totient is φ = 26032384.

The previous prime is 78378647. The next prime is 78378673. The reversal of 78378672 is 27687387.

It is a super-2 number, since 2×78378672² = 12286432448967168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (78378673) 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, 11278 + ... + 16850.

Almost surely, 2^78378672 is an apocalyptic number.

It is an amenable number.

78378672 is an abundant number, since it is smaller than the sum of its proper divisors (124827072).

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

78378672 is a wasteful number, since it uses less digits than its factorization.

78378672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877 (or 5871 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 78378672 is about 8853.1729905159. The cubic root of 78378672 is about 427.9561780038.

The spelling of 78378672 in words is "seventy-eight million, three hundred seventy-eight thousand, six hundred seventy-two".