78591276 has 96 divisors (see below), whose sum is σ = 220147200. Its totient is φ = 24171840.

The previous prime is 78591263. The next prime is 78591281. The reversal of 78591276 is 67219587.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71491 + ... + 72581.

It is an arithmetic number, because the mean of its divisors is an integer number (2293200).

Almost surely, 2^78591276 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78591276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110073600).

78591276 is an abundant number, since it is smaller than the sum of its proper divisors (141555924).

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

78591276 is a wasteful number, since it uses less digits than its factorization.

78591276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1148 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 78591276 is about 8865.1720795481. The cubic root of 78591276 is about 428.3427757444.

The spelling of 78591276 in words is "seventy-eight million, five hundred ninety-one thousand, two hundred seventy-six".