7898940 has 72 divisors (see below), whose sum is σ = 27387360. Its totient is φ = 1805184.

The previous prime is 7898939. The next prime is 7898981. The reversal of 7898940 is 498987.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1875 + ... + 4394.

It is an arithmetic number, because the mean of its divisors is an integer number (380380).

Almost surely, 2^7898940 is an apocalyptic number.

7898940 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7898940 is an abundant number, since it is smaller than the sum of its proper divisors (19488420).

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

7898940 is a wasteful number, since it uses less digits than its factorization.

7898940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6291 (or 6286 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7898940 is about 2810.5052926476. The cubic root of 7898940 is about 199.1542620107.

The spelling of 7898940 in words is "seven million, eight hundred ninety-eight thousand, nine hundred forty".