77074820 has 12 divisors (see below), whose sum is σ = 161857164. Its totient is φ = 30829920.

The previous prime is 77074813. The next prime is 77074847. The reversal of 77074820 is 2847077.

It can be written as a sum of positive squares in 2 ways, for example, as 29767936 + 47306884 = 5456^2 + 6878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926851 + ... + 1926890.

It is an arithmetic number, because the mean of its divisors is an integer number (13488097).

Almost surely, 2^77074820 is an apocalyptic number.

It is an amenable number.

77074820 is an abundant number, since it is smaller than the sum of its proper divisors (84782344).

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

77074820 is a wasteful number, since it uses less digits than its factorization.

77074820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853750 (or 3853748 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 77074820 is about 8779.2266174191. The cubic root of 77074820 is about 425.5698376994.

The spelling of 77074820 in words is "seventy-seven million, seventy-four thousand, eight hundred twenty".