25001998 has 8 divisors (see below), whose sum is σ = 42860592. Its totient is φ = 10715136.

The previous prime is 25001993. The next prime is 25002001. The reversal of 25001998 is 89910052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25001993) 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 in 3 ways as a sum of consecutive naturals, for example, 892915 + ... + 892942.

It is an arithmetic number, because the mean of its divisors is an integer number (5357574).

Almost surely, 2^25001998 is an apocalyptic number.

25001998 is a deficient number, since it is larger than the sum of its proper divisors (17858594).

25001998 is a wasteful number, since it uses less digits than its factorization.

25001998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785866.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 25001998 is about 5000.1997960082. The cubic root of 25001998 is about 292.4095631970.

The spelling of 25001998 in words is "twenty-five million, one thousand, nine hundred ninety-eight".