77916290 has 8 divisors (see below), whose sum is σ = 140249340. Its totient is φ = 31166512.

The previous prime is 77916257. The next prime is 77916313. The reversal of 77916290 is 9261977.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77915929 + 361 = 8827^2 + 19^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3895805 + ... + 3895824.

Almost surely, 2^77916290 is an apocalyptic number.

77916290 is a deficient number, since it is larger than the sum of its proper divisors (62333050).

77916290 is a wasteful number, since it uses less digits than its factorization.

77916290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7791636.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 77916290 is about 8827.0204485999. The cubic root of 77916290 is about 427.1129654845.

The spelling of 77916290 in words is "seventy-seven million, nine hundred sixteen thousand, two hundred ninety".