25440698 has 4 divisors (see below), whose sum is σ = 38161050. Its totient is φ = 12720348.

The previous prime is 25440697. The next prime is 25440703. The reversal of 25440698 is 89604452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20675209 + 4765489 = 4547^2 + 2183^2 .

It is a super-3 number, since 3×25440698³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (25440697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6360173 + ... + 6360176.

Almost surely, 2^25440698 is an apocalyptic number.

25440698 is a deficient number, since it is larger than the sum of its proper divisors (12720352).

25440698 is a wasteful number, since it uses less digits than its factorization.

25440698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12720351.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 25440698 is about 5043.8772784436. The cubic root of 25440698 is about 294.1099207963.

The spelling of 25440698 in words is "twenty-five million, four hundred forty thousand, six hundred ninety-eight".