249226780 has 48 divisors (see below), whose sum is σ = 573116544. Its totient is φ = 90285120.

The previous prime is 249226729. The next prime is 249226793. The reversal of 249226780 is 87622942.

It is a super-2 number, since 2×249226780² = 124227975738336800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60259 + ... + 64261.

It is an arithmetic number, because the mean of its divisors is an integer number (11939928).

Almost surely, 2^249226780 is an apocalyptic number.

249226780 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 249226780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286558272).

249226780 is an abundant number, since it is smaller than the sum of its proper divisors (323889764).

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

249226780 is a wasteful number, since it uses less digits than its factorization.

249226780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306 (or 4304 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 249226780 is about 15786.9180019407. The cubic root of 249226780 is about 629.3103901202.

The spelling of 249226780 in words is "two hundred forty-nine million, two hundred twenty-six thousand, seven hundred eighty".