25497738 has 36 divisors (see below), whose sum is σ = 64266930. Its totient is φ = 7284816.

The previous prime is 25497737. The next prime is 25497749. The reversal of 25497738 is 83779452.

25497738 is a `hidden beast` number, since 2 + 549 + 77 + 38 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13198689 + 12299049 = 3633^2 + 3507^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25497693 and 25497702.

It is not an unprimeable number, because it can be changed into a prime (25497737) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13573 + ... + 15336.

Almost surely, 2^25497738 is an apocalyptic number.

25497738 is an abundant number, since it is smaller than the sum of its proper divisors (38769192).

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

25497738 is a wasteful number, since it uses less digits than its factorization.

25497738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28931 (or 28921 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 25497738 is about 5049.5284928397. The cubic root of 25497738 is about 294.3295624083.

The spelling of 25497738 in words is "twenty-five million, four hundred ninety-seven thousand, seven hundred thirty-eight".