10731978 has 24 divisors (see below), whose sum is σ = 23351328. Its totient is φ = 3562152.

The previous prime is 10731977. The next prime is 10731991. The reversal of 10731978 is 87913701.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (10731977) 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, 3601 + ... + 5867.

It is an arithmetic number, because the mean of its divisors is an integer number (972972).

Almost surely, 2^10731978 is an apocalyptic number.

10731978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10731978 is an abundant number, since it is smaller than the sum of its proper divisors (12619350).

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

10731978 is a wasteful number, since it uses less digits than its factorization.

10731978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538 (or 2535 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 10731978 is about 3275.9697800804. The cubic root of 10731978 is about 220.5768470482.

The spelling of 10731978 in words is "ten million, seven hundred thirty-one thousand, nine hundred seventy-eight".