25998630 has 32 divisors (see below), whose sum is σ = 71311104. Its totient is φ = 5942496.

The previous prime is 25998611. The next prime is 25998641. The reversal of 25998630 is 3689952.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61692 + ... + 62111.

It is an arithmetic number, because the mean of its divisors is an integer number (2228472).

Almost surely, 2^25998630 is an apocalyptic number.

25998630 is an abundant number, since it is smaller than the sum of its proper divisors (45312474).

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

25998630 is a wasteful number, since it uses less digits than its factorization.

25998630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123820.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 25998630 is about 5098.8851722705. The cubic root of 25998630 is about 296.2444033909.

It can be divided in two parts, 259 and 98630, that added together give a palindrome (98889).

The spelling of 25998630 in words is "twenty-five million, nine hundred ninety-eight thousand, six hundred thirty".