249603990 has 32 divisors (see below), whose sum is σ = 599520096. Its totient is φ = 66508800.

The previous prime is 249603967. The next prime is 249603997. The reversal of 249603990 is 99306942.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249603997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49590 + ... + 54390.

It is an arithmetic number, because the mean of its divisors is an integer number (18735003).

Almost surely, 2^249603990 is an apocalyptic number.

249603990 is an abundant number, since it is smaller than the sum of its proper divisors (349916106).

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

249603990 is a wasteful number, since it uses less digits than its factorization.

249603990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 249603990 is about 15798.8604019404. The cubic root of 249603990 is about 629.6277216043.

The spelling of 249603990 in words is "two hundred forty-nine million, six hundred three thousand, nine hundred ninety".