254520640 has 56 divisors (see below), whose sum is σ = 661184352. Its totient is φ = 92551680.

The previous prime is 254520611. The next prime is 254520647. The reversal of 254520640 is 46025452.

254520640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (28) 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 = 254520599 and 254520608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254520647) 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, 32634 + ... + 39673.

Almost surely, 2^254520640 is an apocalyptic number.

254520640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

254520640 is an abundant number, since it is smaller than the sum of its proper divisors (406663712).

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

254520640 is a wasteful number, since it uses less digits than its factorization.

254520640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72335 (or 72325 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 254520640 is about 15953.7030184218. The cubic root of 254520640 is about 633.7349647018.

The spelling of 254520640 in words is "two hundred fifty-four million, five hundred twenty thousand, six hundred forty".