78734780 has 24 divisors (see below), whose sum is σ = 166074720. Its totient is φ = 31354560.

The previous prime is 78734771. The next prime is 78734783. The reversal of 78734780 is 8743787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78734783) 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, 4016 + ... + 13175.

It is an arithmetic number, because the mean of its divisors is an integer number (6919780).

Almost surely, 2^78734780 is an apocalyptic number.

It is an amenable number.

78734780 is an abundant number, since it is smaller than the sum of its proper divisors (87339940).

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

78734780 is a wasteful number, since it uses less digits than its factorization.

78734780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17429 (or 17427 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 78734780 is about 8873.2620833603. The cubic root of 78734780 is about 428.6033285250.

The spelling of 78734780 in words is "seventy-eight million, seven hundred thirty-four thousand, seven hundred eighty".