78712620 has 144 divisors (see below), whose sum is σ = 263033568. Its totient is φ = 17525760.

The previous prime is 78712619. The next prime is 78712637. The reversal of 78712620 is 2621787.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120214 + ... + 120866.

It is an arithmetic number, because the mean of its divisors is an integer number (1826622).

Almost surely, 2^78712620 is an apocalyptic number.

78712620 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78712620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131516784).

78712620 is an abundant number, since it is smaller than the sum of its proper divisors (184320948).

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

78712620 is a wasteful number, since it uses less digits than its factorization.

78712620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 78712620 is about 8872.0133002605. The cubic root of 78712620 is about 428.5631144419.

The spelling of 78712620 in words is "seventy-eight million, seven hundred twelve thousand, six hundred twenty".