76788720 has 120 divisors (see below), whose sum is σ = 269152416. Its totient is φ = 19582464.

The previous prime is 76788713. The next prime is 76788721. The reversal of 76788720 is 2788767.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76788721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14242 + ... + 18878.

Almost surely, 2^76788720 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 76788720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134576208).

76788720 is an abundant number, since it is smaller than the sum of its proper divisors (192363696).

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

76788720 is a wasteful number, since it uses less digits than its factorization.

76788720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679 (or 4670 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 76788720 is about 8762.9173224446. The cubic root of 76788720 is about 425.0426162571.

The spelling of 76788720 in words is "seventy-six million, seven hundred eighty-eight thousand, seven hundred twenty".