78135672 has 32 divisors (see below), whose sum is σ = 206830800. Its totient is φ = 24513024.

The previous prime is 78135671. The next prime is 78135683. The reversal of 78135672 is 27653187.

It is a super-2 number, since 2×78135672² = 12210366477783168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78135672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78135671) 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, 95347 + ... + 96162.

Almost surely, 2^78135672 is an apocalyptic number.

It is an amenable number.

78135672 is an abundant number, since it is smaller than the sum of its proper divisors (128695128).

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

78135672 is a wasteful number, since it uses less digits than its factorization.

78135672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191535 (or 191531 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 78135672 is about 8839.4384437022. The cubic root of 78135672 is about 427.5134512371.

The spelling of 78135672 in words is "seventy-eight million, one hundred thirty-five thousand, six hundred seventy-two".