77712290 has 16 divisors (see below), whose sum is σ = 140147712. Its totient is φ = 31025904.

The previous prime is 77712289. The next prime is 77712293. The reversal of 77712290 is 9221777.

It is a self number, because there is not a number n which added to its sum of digits gives 77712290.

It is not an unprimeable number, because it can be changed into a prime (77712293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1634 + ... + 12573.

It is an arithmetic number, because the mean of its divisors is an integer number (8759232).

Almost surely, 2^77712290 is an apocalyptic number.

77712290 is a deficient number, since it is larger than the sum of its proper divisors (62435422).

77712290 is a wasteful number, since it uses less digits than its factorization.

77712290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14761.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 77712290 is about 8815.4574470075. The cubic root of 77712290 is about 426.7398847600.

The spelling of 77712290 in words is "seventy-seven million, seven hundred twelve thousand, two hundred ninety".