249998454 has 32 divisors (see below), whose sum is σ = 579709440. Its totient is φ = 79709256.

The previous prime is 249998453. The next prime is 249998459. The reversal of 249998454 is 454899942.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 249998454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249998453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99402 + ... + 101885.

It is an arithmetic number, because the mean of its divisors is an integer number (18115920).

Almost surely, 2^249998454 is an apocalyptic number.

249998454 is an abundant number, since it is smaller than the sum of its proper divisors (329710986).

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

249998454 is a wasteful number, since it uses less digits than its factorization.

249998454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201321 (or 201315 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 249998454 is about 15811.3394119537. The cubic root of 249998454 is about 629.9592263861.

The spelling of 249998454 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, four hundred fifty-four".