400290250 has 16 divisors (see below), whose sum is σ = 749343816. Its totient is φ = 160116000.

The previous prime is 400290217. The next prime is 400290251. The reversal of 400290250 is 52092004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50936769 + 349353481 = 7137^2 + 18691^2 .

It is not an unprimeable number, because it can be changed into a prime (400290251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 800331 + ... + 800830.

Almost surely, 2^400290250 is an apocalyptic number.

400290250 is a deficient number, since it is larger than the sum of its proper divisors (349053566).

400290250 is a wasteful number, since it uses less digits than its factorization.

400290250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601178 (or 1601168 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 400290250 is about 20007.2549341483. The cubic root of 400290250 is about 736.9844716634.

The spelling of 400290250 in words is "four hundred million, two hundred ninety thousand, two hundred fifty".