249731628 has 24 divisors (see below), whose sum is σ = 582962688. Its totient is φ = 83207376.

The previous prime is 249731623. The next prime is 249731663. The reversal of 249731628 is 826137942.

249731628 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

249731628 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 249731628.

It is not an unprimeable number, because it can be changed into a prime (249731623) 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, 51225 + ... + 55887.

It is an arithmetic number, because the mean of its divisors is an integer number (24290112).

Almost surely, 2^249731628 is an apocalyptic number.

It is an amenable number.

249731628 is an abundant number, since it is smaller than the sum of its proper divisors (333231060).

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

249731628 is a wasteful number, since it uses less digits than its factorization.

249731628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133 (or 9131 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 249731628 is about 15802.8993542324. The cubic root of 249731628 is about 629.7350258833.

The spelling of 249731628 in words is "two hundred forty-nine million, seven hundred thirty-one thousand, six hundred twenty-eight".