77348420 has 12 divisors (see below), whose sum is σ = 162431724. Its totient is φ = 30939360.

The previous prime is 77348407. The next prime is 77348437. The reversal of 77348420 is 2484377.

It can be written as a sum of positive squares in 2 ways, for example, as 22202944 + 55145476 = 4712^2 + 7426^2 .

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, 1933691 + ... + 1933730.

It is an arithmetic number, because the mean of its divisors is an integer number (13535977).

Almost surely, 2^77348420 is an apocalyptic number.

It is an amenable number.

77348420 is an abundant number, since it is smaller than the sum of its proper divisors (85083304).

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

77348420 is a wasteful number, since it uses less digits than its factorization.

77348420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867430 (or 3867428 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 77348420 is about 8794.7950516200. The cubic root of 77348420 is about 426.0728052661.

The spelling of 77348420 in words is "seventy-seven million, three hundred forty-eight thousand, four hundred twenty".