78707280 has 160 divisors (see below), whose sum is σ = 262268928. Its totient is φ = 19456000.

The previous prime is 78707269. The next prime is 78707327. The reversal of 78707280 is 8270787.

It is a congruent number.

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, 411985 + ... + 412175.

Almost surely, 2^78707280 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 78707280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131134464).

78707280 is an abundant number, since it is smaller than the sum of its proper divisors (183561648).

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

78707280 is a wasteful number, since it uses less digits than its factorization.

78707280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 39.

The square root of 78707280 is about 8871.7123488084. The cubic root of 78707280 is about 428.5534227356.

It can be divided in two parts, 78707 and 280, that added together give a palindrome (78987).

The spelling of 78707280 in words is "seventy-eight million, seven hundred seven thousand, two hundred eighty".