77509396 has 12 divisors (see below), whose sum is σ = 135790452. Its totient is φ = 38712128.

The previous prime is 77509381. The next prime is 77509423. The reversal of 77509396 is 69390577.

It can be written as a sum of positive squares in 2 ways, for example, as 57972996 + 19536400 = 7614^2 + 4420^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6355 + ... + 13978.

It is an arithmetic number, because the mean of its divisors is an integer number (11315871).

Almost surely, 2^77509396 is an apocalyptic number.

It is an amenable number.

77509396 is a deficient number, since it is larger than the sum of its proper divisors (58281056).

77509396 is a wasteful number, since it uses less digits than its factorization.

77509396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21290 (or 21288 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 46.

The square root of 77509396 is about 8803.9420715950. The cubic root of 77509396 is about 426.3681785475.

The spelling of 77509396 in words is "seventy-seven million, five hundred nine thousand, three hundred ninety-six".