249690220 has 72 divisors (see below), whose sum is σ = 600035184. Its totient is φ = 86744064.

The previous prime is 249690209. The next prime is 249690251. The reversal of 249690220 is 22096942.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73479 + ... + 76801.

It is an arithmetic number, because the mean of its divisors is an integer number (8333822).

Almost surely, 2^249690220 is an apocalyptic number.

249690220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249690220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300017592).

249690220 is an abundant number, since it is smaller than the sum of its proper divisors (350344964).

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

249690220 is a wasteful number, since it uses less digits than its factorization.

249690220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379 (or 3360 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 249690220 is about 15801.5891605876. The cubic root of 249690220 is about 629.7002185056.

The spelling of 249690220 in words is "two hundred forty-nine million, six hundred ninety thousand, two hundred twenty".