400252250 has 64 divisors (see below), whose sum is σ = 813050784. Its totient is φ = 146944000.

The previous prime is 400252249. The next prime is 400252261. The reversal of 400252250 is 52252004.

It can be written as a sum of positive squares in 16 ways, for example, as 50225569 + 350026681 = 7087^2 + 18709^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173102 + ... + 175398.

Almost surely, 2^400252250 is an apocalyptic number.

400252250 is an abundant number, since it is smaller than the sum of its proper divisors (412798534).

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

400252250 is a wasteful number, since it uses less digits than its factorization.

400252250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 400252250 is about 20006.3052560936. The cubic root of 400252250 is about 736.9611500061.

The spelling of 400252250 in words is "four hundred million, two hundred fifty-two thousand, two hundred fifty".