254443640 has 48 divisors (see below), whose sum is σ = 629286840. Its totient is φ = 92523200.

The previous prime is 254443639. The next prime is 254443643. The reversal of 254443640 is 46344452.

254443640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 254443597 and 254443606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254443643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21446 + ... + 31125.

Almost surely, 2^254443640 is an apocalyptic number.

254443640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

254443640 is an abundant number, since it is smaller than the sum of its proper divisors (374843200).

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

254443640 is a wasteful number, since it uses less digits than its factorization.

254443640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52604 (or 52589 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 32.

The square root of 254443640 is about 15951.2896030384. The cubic root of 254443640 is about 633.6710504170.

The spelling of 254443640 in words is "two hundred fifty-four million, four hundred forty-three thousand, six hundred forty".