250406390 has 32 divisors (see below), whose sum is σ = 490142016. Its totient is φ = 91555200.

The previous prime is 250406389. The next prime is 250406399. The reversal of 250406390 is 93604052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250406399) 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 15 ways as a sum of consecutive naturals, for example, 4040 + ... + 22740.

It is an arithmetic number, because the mean of its divisors is an integer number (15316938).

Almost surely, 2^250406390 is an apocalyptic number.

250406390 is a deficient number, since it is larger than the sum of its proper divisors (239735626).

250406390 is a wasteful number, since it uses less digits than its factorization.

250406390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18824.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 250406390 is about 15824.2342626745. The cubic root of 250406390 is about 630.3016863650.

The spelling of 250406390 in words is "two hundred fifty million, four hundred six thousand, three hundred ninety".