254778940 has 24 divisors (see below), whose sum is σ = 576192960. Its totient is φ = 94072128.

The previous prime is 254778917. The next prime is 254778967. The reversal of 254778940 is 49877452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489700 + ... + 490219.

It is an arithmetic number, because the mean of its divisors is an integer number (24008040).

Almost surely, 2^254778940 is an apocalyptic number.

254778940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

254778940 is an abundant number, since it is smaller than the sum of its proper divisors (321414020).

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

254778940 is a wasteful number, since it uses less digits than its factorization.

254778940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979941 (or 979939 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The square root of 254778940 is about 15961.7962648319. The cubic root of 254778940 is about 633.9492739720.

The spelling of 254778940 in words is "two hundred fifty-four million, seven hundred seventy-eight thousand, nine hundred forty".