25630770 has 64 divisors (see below), whose sum is σ = 67858560. Its totient is φ = 6144000.

The previous prime is 25630757. The next prime is 25630771. The reversal of 25630770 is 7703652.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25630771) 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, 32946 + ... + 33714.

It is an arithmetic number, because the mean of its divisors is an integer number (1060290).

Almost surely, 2^25630770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25630770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33929280).

25630770 is an abundant number, since it is smaller than the sum of its proper divisors (42227790).

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

25630770 is a wasteful number, since it uses less digits than its factorization.

25630770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891.

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 25630770 is about 5062.6840707277. The cubic root of 25630770 is about 294.8405534982.

The spelling of 25630770 in words is "twenty-five million, six hundred thirty thousand, seven hundred seventy".