249780454 has 32 divisors (see below), whose sum is σ = 482199552. Its totient is φ = 94176000.

The previous prime is 249780413. The next prime is 249780457. The reversal of 249780454 is 454087942.

It is a super-2 number, since 2×249780454² = 124780550400892232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 249780454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249780457) 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, 21387 + ... + 30934.

It is an arithmetic number, because the mean of its divisors is an integer number (15068736).

Almost surely, 2^249780454 is an apocalyptic number.

249780454 is a deficient number, since it is larger than the sum of its proper divisors (232419098).

249780454 is a wasteful number, since it uses less digits than its factorization.

249780454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52372.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 249780454 is about 15804.4441218285. Note that the first 3 decimals coincide. The cubic root of 249780454 is about 629.7760638554.

The spelling of 249780454 in words is "two hundred forty-nine million, seven hundred eighty thousand, four hundred fifty-four".