25715730 has 32 divisors (see below), whose sum is σ = 65349504. Its totient is φ = 6454016.

The previous prime is 25715719. The next prime is 25715737. The reversal of 25715730 is 3751752.

It is a super-2 number, since 2×25715730² = 1322597538865800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (25715737) 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, 24702 + ... + 25721.

It is an arithmetic number, because the mean of its divisors is an integer number (2042172).

Almost surely, 2^25715730 is an apocalyptic number.

25715730 is an abundant number, since it is smaller than the sum of its proper divisors (39633774).

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

25715730 is a wasteful number, since it uses less digits than its factorization.

25715730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50450.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 25715730 is about 5071.0679348634. The cubic root of 25715730 is about 295.1659699978.

The spelling of 25715730 in words is "twenty-five million, seven hundred fifteen thousand, seven hundred thirty".