77970704 has 80 divisors (see below), whose sum is σ = 188845056. Its totient is φ = 30412800.

The previous prime is 77970703. The next prime is 77970727. The reversal of 77970704 is 40707977.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77970701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58364 + ... + 59684.

Almost surely, 2^77970704 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 77970704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94422528).

77970704 is an abundant number, since it is smaller than the sum of its proper divisors (110874352).

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

77970704 is a wasteful number, since it uses less digits than its factorization.

77970704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 77970704 is about 8830.1021511645. The cubic root of 77970704 is about 427.2123692454.

The spelling of 77970704 in words is "seventy-seven million, nine hundred seventy thousand, seven hundred four".