25505670 has 16 divisors (see below), whose sum is σ = 61213680. Its totient is φ = 6801504.

The previous prime is 25505647. The next prime is 25505677. The reversal of 25505670 is 7650552.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 850189 = 25505670 / (2 + 5 + 5 + 0 + 5 + 6 + 7 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425065 + ... + 425124.

It is an arithmetic number, because the mean of its divisors is an integer number (3825855).

Almost surely, 2^25505670 is an apocalyptic number.

25505670 is an abundant number, since it is smaller than the sum of its proper divisors (35708010).

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

25505670 is a wasteful number, since it uses less digits than its factorization.

25505670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850199.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 25505670 is about 5050.3138516334. The cubic root of 25505670 is about 294.3600798871.

The spelling of 25505670 in words is "twenty-five million, five hundred five thousand, six hundred seventy".