25628617 has 8 divisors (see below), whose sum is σ = 29888000. Its totient is φ = 21967092.

The previous prime is 25628611. The next prime is 25628623. The reversal of 25628617 is 71682652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25628611) and next prime (25628623).

It is not a de Polignac number, because 25628617 - 2¹¹ = 25626569 is a prime.

It is a super-3 number, since 3×25628617³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25628611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37017 + ... + 37702.

It is an arithmetic number, because the mean of its divisors is an integer number (3736000).

Almost surely, 2^25628617 is an apocalyptic number.

It is an amenable number.

25628617 is a deficient number, since it is larger than the sum of its proper divisors (4259383).

25628617 is an frugal number, since it uses more digits than its factorization.

25628617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74740 (or 74726 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 25628617 is about 5062.4714320182. The cubic root of 25628617 is about 294.8322976728.

The spelling of 25628617 in words is "twenty-five million, six hundred twenty-eight thousand, six hundred seventeen".