25263620 has 12 divisors (see below), whose sum is σ = 53053644. Its totient is φ = 10105440.

The previous prime is 25263619. The next prime is 25263643. The reversal of 25263620 is 2636252.

It can be written as a sum of positive squares in 2 ways, for example, as 14622976 + 10640644 = 3824^2 + 3262^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25263620.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631571 + ... + 631610.

It is an arithmetic number, because the mean of its divisors is an integer number (4421137).

Almost surely, 2^25263620 is an apocalyptic number.

25263620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25263620 is an abundant number, since it is smaller than the sum of its proper divisors (27790024).

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

25263620 is a wasteful number, since it uses less digits than its factorization.

25263620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263190 (or 1263188 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 25263620 is about 5026.2928685066. The cubic root of 25263620 is about 293.4259550257.

Adding to 25263620 its reverse (2636252), we get a palindrome (27899872).

The spelling of 25263620 in words is "twenty-five million, two hundred sixty-three thousand, six hundred twenty".