7981788 has 24 divisors (see below), whose sum is σ = 19128592. Its totient is φ = 2588544.

The previous prime is 7981783. The next prime is 7981793. The reversal of 7981788 is 8871897.

It is an interprime number because it is at equal distance from previous prime (7981783) and next prime (7981793).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7981783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8545 + ... + 9432.

Almost surely, 2^7981788 is an apocalyptic number.

It is an amenable number.

7981788 is an abundant number, since it is smaller than the sum of its proper divisors (11146804).

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

7981788 is a wasteful number, since it uses less digits than its factorization.

7981788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18021 (or 18019 counting only the distinct ones).

The product of its digits is 225792, while the sum is 48.

The square root of 7981788 is about 2825.2058332093. The cubic root of 7981788 is about 199.8481180219.

The spelling of 7981788 in words is "seven million, nine hundred eighty-one thousand, seven hundred eighty-eight".