6425988 has 12 divisors (see below), whose sum is σ = 14994000. Its totient is φ = 2141992.

The previous prime is 6425987. The next prime is 6425989. The reversal of 6425988 is 8895246.

It is an interprime number because it is at equal distance from previous prime (6425987) and next prime (6425989).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×6425988² = 82586643552288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) 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 (6425987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267738 + ... + 267761.

It is an arithmetic number, because the mean of its divisors is an integer number (1249500).

Almost surely, 2^6425988 is an apocalyptic number.

It is an amenable number.

6425988 is an abundant number, since it is smaller than the sum of its proper divisors (8568012).

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

6425988 is a wasteful number, since it uses less digits than its factorization.

6425988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535506 (or 535504 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 6425988 is about 2534.9532540069. The cubic root of 6425988 is about 185.9145173157.

The spelling of 6425988 in words is "six million, four hundred twenty-five thousand, nine hundred eighty-eight".