25997622 has 16 divisors (see below), whose sum is σ = 59423232. Its totient is φ = 7427880.

The previous prime is 25997611. The next prime is 25997633. The reversal of 25997622 is 22679952.

It is an interprime number because it is at equal distance from previous prime (25997611) and next prime (25997633).

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 618991 = 25997622 / (2 + 5 + 9 + 9 + 7 + 6 + 2 + 2).

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, 309454 + ... + 309537.

It is an arithmetic number, because the mean of its divisors is an integer number (3713952).

Almost surely, 2^25997622 is an apocalyptic number.

25997622 is an abundant number, since it is smaller than the sum of its proper divisors (33425610).

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

25997622 is a wasteful number, since it uses less digits than its factorization.

25997622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619003.

The product of its digits is 136080, while the sum is 42.

The square root of 25997622 is about 5098.7863261761. The cubic root of 25997622 is about 296.2405747504.

The spelling of 25997622 in words is "twenty-five million, nine hundred ninety-seven thousand, six hundred twenty-two".