77700390 has 16 divisors (see below), whose sum is σ = 186481008. Its totient is φ = 20720096.

The previous prime is 77700379. The next prime is 77700401. The reversal of 77700390 is 9300777.

It is an interprime number because it is at equal distance from previous prime (77700379) and next prime (77700401).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294977 + ... + 1295036.

It is an arithmetic number, because the mean of its divisors is an integer number (11655063).

Almost surely, 2^77700390 is an apocalyptic number.

77700390 is an abundant number, since it is smaller than the sum of its proper divisors (108780618).

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

77700390 is a wasteful number, since it uses less digits than its factorization.

77700390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590023.

The product of its (nonzero) digits is 9261, while the sum is 33.

The square root of 77700390 is about 8814.7824703733. The cubic root of 77700390 is about 426.7181015738.

The spelling of 77700390 in words is "seventy-seven million, seven hundred thousand, three hundred ninety".