254678990 has 16 divisors (see below), whose sum is σ = 459188352. Its totient is φ = 101701344.

The previous prime is 254678971. The next prime is 254679001. The reversal of 254678990 is 99876452.

It is a happy number.

It is a super-2 number, since 2×254678990² = 129722775894840200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14909 + ... + 27048.

It is an arithmetic number, because the mean of its divisors is an integer number (28699272).

Almost surely, 2^254678990 is an apocalyptic number.

254678990 is a deficient number, since it is larger than the sum of its proper divisors (204509362).

254678990 is a wasteful number, since it uses less digits than its factorization.

254678990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42571.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 254678990 is about 15958.6650444202. The cubic root of 254678990 is about 633.8663635117.

The spelling of 254678990 in words is "two hundred fifty-four million, six hundred seventy-eight thousand, nine hundred ninety".