77650890 has 16 divisors (see below), whose sum is σ = 186362208. Its totient is φ = 20706896.

The previous prime is 77650889. The next prime is 77650897. The reversal of 77650890 is 9805677.

It is not an unprimeable number, because it can be changed into a prime (77650897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294152 + ... + 1294211.

It is an arithmetic number, because the mean of its divisors is an integer number (11647638).

Almost surely, 2^77650890 is an apocalyptic number.

77650890 is an abundant number, since it is smaller than the sum of its proper divisors (108711318).

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

77650890 is a wasteful number, since it uses less digits than its factorization.

77650890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588373.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 77650890 is about 8811.9742396355. The cubic root of 77650890 is about 426.6274669662.

The spelling of 77650890 in words is "seventy-seven million, six hundred fifty thousand, eight hundred ninety".