250400520 has 96 divisors (see below), whose sum is σ = 816543000. Its totient is φ = 66548736.

The previous prime is 250400483. The next prime is 250400561. The reversal of 250400520 is 25004052.

It can be written as a sum of positive squares in 4 ways, for example, as 238331844 + 12068676 = 15438^2 + 3474^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 250400493 and 250400502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124644 + ... + 126636.

Almost surely, 2^250400520 is an apocalyptic number.

250400520 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 250400520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408271500).

250400520 is an abundant number, since it is smaller than the sum of its proper divisors (566142480).

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

250400520 is a wasteful number, since it uses less digits than its factorization.

250400520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359 (or 2352 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 250400520 is about 15824.0487865780. The cubic root of 250400520 is about 630.2967611715.

Adding to 250400520 its reverse (25004052), we get a palindrome (275404572).

The spelling of 250400520 in words is "two hundred fifty million, four hundred thousand, five hundred twenty".