425988 has 18 divisors (see below), whose sum is σ = 1076894. Its totient is φ = 141984.

The previous prime is 425987. The next prime is 425989. The reversal of 425988 is 889524.

It is an interprime number because it is at equal distance from previous prime (425987) and next prime (425989).

It can be written as a sum of positive squares in only one way, i.e., 419904 + 6084 = 648^2 + 78^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×425988² = 362931552288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11833 = 425988 / (4 + 2 + 5 + 9 + 8 + 8).

It is not an unprimeable number, because it can be changed into a prime (425987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5881 + ... + 5952.

425988 is a Friedman number, since it can be written as 4+8^5*(9+8/2), using all its digits and the basic arithmetic operations.

2⁴²⁵⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

425988 is an abundant number, since it is smaller than the sum of its proper divisors (650906).

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

425988 is a wasteful number, since it uses less digits than its factorization.

425988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11843 (or 11838 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 425988 is about 652.6775620473. The cubic root of 425988 is about 75.2429455166.

The spelling of 425988 in words is "four hundred twenty-five thousand, nine hundred eighty-eight".