253978520 has 32 divisors (see below), whose sum is σ = 591159600. Its totient is φ = 98087808.

The previous prime is 253978519. The next prime is 253978523. The reversal of 253978520 is 25879352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253978523) 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, 108314 + ... + 110633.

Almost surely, 2^253978520 is an apocalyptic number.

253978520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253978520 is an abundant number, since it is smaller than the sum of its proper divisors (337181080).

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

253978520 is a wasteful number, since it uses less digits than its factorization.

253978520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218987 (or 218983 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 41.

The square root of 253978520 is about 15936.7035487268. The cubic root of 253978520 is about 633.2847004823.

The spelling of 253978520 in words is "two hundred fifty-three million, nine hundred seventy-eight thousand, five hundred twenty".