249434780 has 24 divisors (see below), whose sum is σ = 598643808. Its totient is φ = 85520448.

The previous prime is 249434777. The next prime is 249434789. The reversal of 249434780 is 87434942.

249434780 = T₂₁₂₇ + T₂₁₂₈ + ... + T₂₂₃₁.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249434789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 890699 + ... + 890978.

It is an arithmetic number, because the mean of its divisors is an integer number (24943492).

Almost surely, 2^249434780 is an apocalyptic number.

249434780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249434780 is an abundant number, since it is smaller than the sum of its proper divisors (349209028).

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

249434780 is a wasteful number, since it uses less digits than its factorization.

249434780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781693 (or 1781691 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 249434780 is about 15793.5043609707. The cubic root of 249434780 is about 629.4854116587.

The spelling of 249434780 in words is "two hundred forty-nine million, four hundred thirty-four thousand, seven hundred eighty".