77138308 has 12 divisors (see below), whose sum is σ = 145376140. Its totient is φ = 35602272.

The previous prime is 77138287. The next prime is 77138329. The reversal of 77138308 is 80383177.

It is an interprime number because it is at equal distance from previous prime (77138287) and next prime (77138329).

It can be written as a sum of positive squares in 2 ways, for example, as 5769604 + 71368704 = 2402^2 + 8448^2 .

It is a super-2 number, since 2×77138308² = 11900637122205728, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 741663 + ... + 741766.

Almost surely, 2^77138308 is an apocalyptic number.

It is an amenable number.

77138308 is a deficient number, since it is larger than the sum of its proper divisors (68237832).

77138308 is a wasteful number, since it uses less digits than its factorization.

77138308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483446 (or 1483444 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 77138308 is about 8782.8416813694. The cubic root of 77138308 is about 425.6866556289.

The spelling of 77138308 in words is "seventy-seven million, one hundred thirty-eight thousand, three hundred eight".