77731050 has 24 divisors (see below), whose sum is σ = 192773376. Its totient is φ = 20728240.

The previous prime is 77731037. The next prime is 77731051. The reversal of 77731050 is 5013777.

It is a super-2 number, since 2×77731050² = 12084232268205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 77730999 and 77731017.

It is not an unprimeable number, because it can be changed into a prime (77731051) 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 11 ways as a sum of consecutive naturals, for example, 258954 + ... + 259253.

It is an arithmetic number, because the mean of its divisors is an integer number (8032224).

Almost surely, 2^77731050 is an apocalyptic number.

77731050 is an abundant number, since it is smaller than the sum of its proper divisors (115042326).

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

77731050 is a wasteful number, since it uses less digits than its factorization.

77731050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518222 (or 518217 counting only the distinct ones).

The product of its (nonzero) digits is 5145, while the sum is 30.

The square root of 77731050 is about 8816.5214228742. The cubic root of 77731050 is about 426.7742207967.

The spelling of 77731050 in words is "seventy-seven million, seven hundred thirty-one thousand, fifty".