7981892 has 6 divisors (see below), whose sum is σ = 13968318. Its totient is φ = 3990944.

The previous prime is 7981889. The next prime is 7981907. The reversal of 7981892 is 2981897.

It can be written as a sum of positive squares in only one way, i.e., 5597956 + 2383936 = 2366^2 + 1544^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997733 + ... + 997740.

It is an arithmetic number, because the mean of its divisors is an integer number (2328053).

Almost surely, 2^7981892 is an apocalyptic number.

It is an amenable number.

7981892 is a deficient number, since it is larger than the sum of its proper divisors (5986426).

7981892 is a wasteful number, since it uses less digits than its factorization.

7981892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995477 (or 1995475 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The square root of 7981892 is about 2825.2242388880. The cubic root of 7981892 is about 199.8489860026.

The spelling of 7981892 in words is "seven million, nine hundred eighty-one thousand, eight hundred ninety-two".