254638140 has 24 divisors (see below), whose sum is σ = 712986960. Its totient is φ = 67903488.

The previous prime is 254638099. The next prime is 254638141. The reversal of 254638140 is 41836452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254638141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2121925 + ... + 2122044.

It is an arithmetic number, because the mean of its divisors is an integer number (29707790).

Almost surely, 2^254638140 is an apocalyptic number.

254638140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

254638140 is an abundant number, since it is smaller than the sum of its proper divisors (458348820).

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

254638140 is a wasteful number, since it uses less digits than its factorization.

254638140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4243981 (or 4243979 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 254638140 is about 15957.3851241361. The cubic root of 254638140 is about 633.8324714011.

The spelling of 254638140 in words is "two hundred fifty-four million, six hundred thirty-eight thousand, one hundred forty".