78271236 has 36 divisors (see below), whose sum is σ = 198516864. Its totient is φ = 26002800.

The previous prime is 78271211. The next prime is 78271253. The reversal of 78271236 is 63217287.

78271236 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78271236² = 12252772769935392, which contains 22 as substring.

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

78271236 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 78271236.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7701 + ... + 14691.

Almost surely, 2^78271236 is an apocalyptic number.

It is an amenable number.

78271236 is an abundant number, since it is smaller than the sum of its proper divisors (120245628).

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

78271236 is a wasteful number, since it uses less digits than its factorization.

78271236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7312 (or 7307 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 78271236 is about 8847.1032547382. The cubic root of 78271236 is about 427.7605511300.

The spelling of 78271236 in words is "seventy-eight million, two hundred seventy-one thousand, two hundred thirty-six".