254478440 has 128 divisors (see below), whose sum is σ = 646652160. Its totient is φ = 89616384.

The previous prime is 254478403. The next prime is 254478443. The reversal of 254478440 is 44874452.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 254478394 and 254478403.

It is not an unprimeable number, because it can be changed into a prime (254478443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 828767 + ... + 829073.

It is an arithmetic number, because the mean of its divisors is an integer number (5051970).

Almost surely, 2^254478440 is an apocalyptic number.

254478440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 254478440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323326080).

254478440 is an abundant number, since it is smaller than the sum of its proper divisors (392173720).

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

254478440 is a wasteful number, since it uses less digits than its factorization.

254478440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 38.

The square root of 254478440 is about 15952.3803866382. The cubic root of 254478440 is about 633.6999379503.

The spelling of 254478440 in words is "two hundred fifty-four million, four hundred seventy-eight thousand, four hundred forty".