25830657 has 36 divisors (see below), whose sum is σ = 40308736. Its totient is φ = 16533720.

The previous prime is 25830653. The next prime is 25830689. The reversal of 25830657 is 75603852.

It is not a de Polignac number, because 25830657 - 2² = 25830653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25830653) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 203328 + ... + 203454.

Almost surely, 2^25830657 is an apocalyptic number.

25830657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25830657 is a deficient number, since it is larger than the sum of its proper divisors (14478079).

25830657 is an frugal number, since it uses more digits than its factorization.

25830657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25830657 is about 5082.3869392245. The cubic root of 25830657 is about 295.6050285009.

The spelling of 25830657 in words is "twenty-five million, eight hundred thirty thousand, six hundred fifty-seven".