249470280 has 160 divisors (see below), whose sum is σ = 861573240. Its totient is φ = 64696320.

The previous prime is 249470269. The next prime is 249470321. The reversal of 249470280 is 82074942.

It can be written as a sum of positive squares in 4 ways, for example, as 228070404 + 21399876 = 15102^2 + 4626^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 118840 + ... + 120920.

Almost surely, 2^249470280 is an apocalyptic number.

249470280 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 249470280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430786620).

249470280 is an abundant number, since it is smaller than the sum of its proper divisors (612102960).

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

249470280 is a wasteful number, since it uses less digits than its factorization.

249470280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141 (or 2128 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 249470280 is about 15794.6282007523. The cubic root of 249470280 is about 629.5152734020.

The spelling of 249470280 in words is "two hundred forty-nine million, four hundred seventy thousand, two hundred eighty".