77630886 has 40 divisors (see below), whose sum is σ = 174620424. Its totient is φ = 25777440.

The previous prime is 77630881. The next prime is 77630893. The reversal of 77630886 is 68803677.

77630886 is a `hidden beast` number, since 7 + 7 + 630 + 8 + 8 + 6 = 666.

It is a super-2 number, since 2×77630886² = 12053108922289992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77630881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49941 + ... + 51471.

Almost surely, 2^77630886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77630886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87310212).

77630886 is an abundant number, since it is smaller than the sum of its proper divisors (96989538).

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

77630886 is a wasteful number, since it uses less digits than its factorization.

77630886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 77630886 is about 8810.8391200839. The cubic root of 77630886 is about 426.5908286705.

The spelling of 77630886 in words is "seventy-seven million, six hundred thirty thousand, eight hundred eighty-six".