78780884 has 24 divisors (see below), whose sum is σ = 169682688. Its totient is φ = 31165920.

The previous prime is 78780869. The next prime is 78780887. The reversal of 78780884 is 48808787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78780887) 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, 107852 + ... + 108579.

It is an arithmetic number, because the mean of its divisors is an integer number (7070112).

Almost surely, 2^78780884 is an apocalyptic number.

It is an amenable number.

78780884 is an abundant number, since it is smaller than the sum of its proper divisors (90901804).

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

78780884 is a wasteful number, since it uses less digits than its factorization.

78780884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216455 (or 216453 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 50.

The square root of 78780884 is about 8875.8596203410. The cubic root of 78780884 is about 428.6869699693.

The spelling of 78780884 in words is "seventy-eight million, seven hundred eighty thousand, eight hundred eighty-four".