77949190 has 32 divisors (see below), whose sum is σ = 158008320. Its totient is φ = 27429600.

The previous prime is 77949163. The next prime is 77949197. The reversal of 77949190 is 9194977.

It is a super-2 number, since 2×77949190² = 12152152443312200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77949190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77949197) 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 15 ways as a sum of consecutive naturals, for example, 8020 + ... + 14839.

It is an arithmetic number, because the mean of its divisors is an integer number (4937760).

Almost surely, 2^77949190 is an apocalyptic number.

77949190 is an abundant number, since it is smaller than the sum of its proper divisors (80059130).

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

77949190 is a wasteful number, since it uses less digits than its factorization.

77949190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22908.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 77949190 is about 8828.8838479165. The cubic root of 77949190 is about 427.1730728947.

The spelling of 77949190 in words is "seventy-seven million, nine hundred forty-nine thousand, one hundred ninety".