31077018 has 24 divisors (see below), whose sum is σ = 76952928. Its totient is φ = 8879112.

The previous prime is 31077017. The next prime is 31077031. The reversal of 31077018 is 81077013.

It is a junction number, because it is equal to n+sod(n) for n = 31076982 and 31077000.

It is not an unprimeable number, because it can be changed into a prime (31077017) 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 11 ways as a sum of consecutive naturals, for example, 123196 + ... + 123447.

It is an arithmetic number, because the mean of its divisors is an integer number (3206372).

Almost surely, 2^31077018 is an apocalyptic number.

31077018 is an abundant number, since it is smaller than the sum of its proper divisors (45875910).

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

31077018 is a wasteful number, since it uses less digits than its factorization.

31077018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246658 (or 246655 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 31077018 is about 5574.6764928559. The cubic root of 31077018 is about 314.3980036973.

The spelling of 31077018 in words is "thirty-one million, seventy-seven thousand, eighteen".