7898988 has 24 divisors (see below), whose sum is σ = 18486720. Its totient is φ = 2625040.

The previous prime is 7898983. The next prime is 7898993. The reversal of 7898988 is 8898987.

7898988 is digitally balanced in base 4 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7898983) and next prime (7898993).

It is a super-2 number, since 2×7898988² = 124788022848288, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7898981) 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, 4243 + ... + 5813.

It is an arithmetic number, because the mean of its divisors is an integer number (770280).

Almost surely, 2^7898988 is an apocalyptic number.

It is an amenable number.

7898988 is an abundant number, since it is smaller than the sum of its proper divisors (10587732).

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

7898988 is a wasteful number, since it uses less digits than its factorization.

7898988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1995 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 57.

The square root of 7898988 is about 2810.5138320243. The cubic root of 7898988 is about 199.1546654144.

Subtracting 7898988 from its reverse (8898987), we obtain a palindrome (999999).

The spelling of 7898988 in words is "seven million, eight hundred ninety-eight thousand, nine hundred eighty-eight".