249412220 has 24 divisors (see below), whose sum is σ = 529169424. Its totient is φ = 98735616.

The previous prime is 249412211. The next prime is 249412231. The reversal of 249412220 is 22214942.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 249412220.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 62342 + ... + 66221.

It is an arithmetic number, because the mean of its divisors is an integer number (22048726).

Almost surely, 2^249412220 is an apocalyptic number.

249412220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249412220 is an abundant number, since it is smaller than the sum of its proper divisors (279757204).

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

249412220 is a wasteful number, since it uses less digits than its factorization.

249412220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128669 (or 128667 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 249412220 is about 15792.7901271435. The cubic root of 249412220 is about 629.4664332588.

The spelling of 249412220 in words is "two hundred forty-nine million, four hundred twelve thousand, two hundred twenty".