249172990 has 32 divisors (see below), whose sum is σ = 501228000. Its totient is φ = 88396800.

The previous prime is 249172969. The next prime is 249172993. The reversal of 249172990 is 99271942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249172993) 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, 23115 + ... + 32134.

It is an arithmetic number, because the mean of its divisors is an integer number (15663375).

Almost surely, 2^249172990 is an apocalyptic number.

249172990 is an abundant number, since it is smaller than the sum of its proper divisors (252055010).

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

249172990 is a wasteful number, since it uses less digits than its factorization.

249172990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55308.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 249172990 is about 15785.2142842598. The cubic root of 249172990 is about 629.2651126940.

The spelling of 249172990 in words is "two hundred forty-nine million, one hundred seventy-two thousand, nine hundred ninety".