249020280 has 48 divisors (see below), whose sum is σ = 809317080. Its totient is φ = 66405312.

The previous prime is 249020263. The next prime is 249020281. The reversal of 249020280 is 82020942.

It is a super-2 number, since 2×249020280² = 124022199702556800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249020281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345502 + ... + 346221.

Almost surely, 2^249020280 is an apocalyptic number.

249020280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249020280 is an abundant number, since it is smaller than the sum of its proper divisors (560296800).

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

249020280 is a wasteful number, since it uses less digits than its factorization.

249020280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691740 (or 691733 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 249020280 is about 15780.3764213659. The cubic root of 249020280 is about 629.1365344009.

The spelling of 249020280 in words is "two hundred forty-nine million, twenty thousand, two hundred eighty".