25628669 has 4 divisors (see below), whose sum is σ = 27958560. Its totient is φ = 23298780.

The previous prime is 25628641. The next prime is 25628671. The reversal of 25628669 is 96682652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25628669 - 2²⁰ = 24580093 is a prime.

It is a super-2 number, since 2×25628669² = 1313657349423122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25628689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164929 + ... + 1164950.

It is an arithmetic number, because the mean of its divisors is an integer number (6989640).

Almost surely, 2^25628669 is an apocalyptic number.

It is an amenable number.

25628669 is a deficient number, since it is larger than the sum of its proper divisors (2329891).

25628669 is a wasteful number, since it uses less digits than its factorization.

25628669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329890.

The product of its digits is 311040, while the sum is 44.

The square root of 25628669 is about 5062.4765678470. The cubic root of 25628669 is about 294.8324970758.

The spelling of 25628669 in words is "twenty-five million, six hundred twenty-eight thousand, six hundred sixty-nine".