77730090 has 32 divisors (see below), whose sum is σ = 189184896. Its totient is φ = 20435520.

The previous prime is 77730089. The next prime is 77730091. The reversal of 77730090 is 9003777.

It is an interprime number because it is at equal distance from previous prime (77730089) and next prime (77730091).

It is not an unprimeable number, because it can be changed into a prime (77730091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16117 + ... + 20376.

It is an arithmetic number, because the mean of its divisors is an integer number (5912028).

Almost surely, 2^77730090 is an apocalyptic number.

77730090 is an abundant number, since it is smaller than the sum of its proper divisors (111454806).

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

77730090 is a wasteful number, since it uses less digits than its factorization.

77730090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36574.

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

The square root of 77730090 is about 8816.4669794652. The cubic root of 77730090 is about 426.7724638629.

The spelling of 77730090 in words is "seventy-seven million, seven hundred thirty thousand, ninety".