254407640 has 16 divisors (see below), whose sum is σ = 572417280. Its totient is φ = 101763040.

The previous prime is 254407639. The next prime is 254407649. The reversal of 254407640 is 46704452.

It is a junction number, because it is equal to n+sod(n) for n = 254407597 and 254407606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254407649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3180056 + ... + 3180135.

It is an arithmetic number, because the mean of its divisors is an integer number (35776080).

Almost surely, 2^254407640 is an apocalyptic number.

254407640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

254407640 is an abundant number, since it is smaller than the sum of its proper divisors (318009640).

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

254407640 is a wasteful number, since it uses less digits than its factorization.

254407640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6360202 (or 6360198 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 254407640 is about 15950.1611277128. The cubic root of 254407640 is about 633.6411639901.

The spelling of 254407640 in words is "two hundred fifty-four million, four hundred seven thousand, six hundred forty".