25520238 has 16 divisors (see below), whose sum is σ = 56711760. Its totient is φ = 8506728.

The previous prime is 25520221. The next prime is 25520267. The reversal of 25520238 is 83202552.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236245 + ... + 236352.

It is an arithmetic number, because the mean of its divisors is an integer number (3544485).

Almost surely, 2^25520238 is an apocalyptic number.

25520238 is an abundant number, since it is smaller than the sum of its proper divisors (31191522).

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

25520238 is a wasteful number, since it uses less digits than its factorization.

25520238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472608 (or 472602 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 25520238 is about 5051.7559323467. The cubic root of 25520238 is about 294.4161121533.

The spelling of 25520238 in words is "twenty-five million, five hundred twenty thousand, two hundred thirty-eight".