25477998 has 32 divisors (see below), whose sum is σ = 62716416. Its totient is φ = 6719328.

The previous prime is 25477981. The next prime is 25477999. The reversal of 25477998 is 89977452.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25477998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25477999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22786 + ... + 23877.

It is an arithmetic number, because the mean of its divisors is an integer number (1959888).

Almost surely, 2^25477998 is an apocalyptic number.

25477998 is an abundant number, since it is smaller than the sum of its proper divisors (37238418).

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

25477998 is a wasteful number, since it uses less digits than its factorization.

25477998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46688.

The product of its digits is 1270080, while the sum is 51.

The square root of 25477998 is about 5047.5734764340. The cubic root of 25477998 is about 294.2535874915.

The spelling of 25477998 in words is "twenty-five million, four hundred seventy-seven thousand, nine hundred ninety-eight".