25628670 has 64 divisors (see below), whose sum is σ = 71331840. Its totient is φ = 6535584.

The previous prime is 25628641. The next prime is 25628671. The reversal of 25628670 is 7682652.

25628670 is a `hidden beast` number, since 25 + 628 + 6 + 7 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25628671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4147 + ... + 8273.

It is an arithmetic number, because the mean of its divisors is an integer number (1114560).

Almost surely, 2^25628670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25628670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35665920).

25628670 is an abundant number, since it is smaller than the sum of its proper divisors (45703170).

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

25628670 is a wasteful number, since it uses less digits than its factorization.

25628670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166 (or 4160 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 25628670 is about 5062.4766666129. The cubic root of 25628670 is about 294.8325009104.

The spelling of 25628670 in words is "twenty-five million, six hundred twenty-eight thousand, six hundred seventy".