78726480 has 80 divisors (see below), whose sum is σ = 278922624. Its totient is φ = 17994240.

The previous prime is 78726469. The next prime is 78726497. The reversal of 78726480 is 8462787.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21751 + ... + 25110.

Almost surely, 2^78726480 is an apocalyptic number.

78726480 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78726480 is an abundant number, since it is smaller than the sum of its proper divisors (200196144).

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

78726480 is a wasteful number, since it uses less digits than its factorization.

78726480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46884 (or 46878 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 78726480 is about 8872.7943738148. The cubic root of 78726480 is about 428.5882672749.

The spelling of 78726480 in words is "seventy-eight million, seven hundred twenty-six thousand, four hundred eighty".