25279930 has 32 divisors (see below), whose sum is σ = 49392000. Its totient is φ = 9260352.

The previous prime is 25279913. The next prime is 25279939. The reversal of 25279930 is 3997252.

It is a self number, because there is not a number n which added to its sum of digits gives 25279930.

It is not an unprimeable number, because it can be changed into a prime (25279939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17371 + ... + 18769.

It is an arithmetic number, because the mean of its divisors is an integer number (1543500).

Almost surely, 2^25279930 is an apocalyptic number.

25279930 is a deficient number, since it is larger than the sum of its proper divisors (24112070).

25279930 is a wasteful number, since it uses less digits than its factorization.

25279930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 25279930 is about 5027.9150748596. The cubic root of 25279930 is about 293.4890859600.

The spelling of 25279930 in words is "twenty-five million, two hundred seventy-nine thousand, nine hundred thirty".