249239628 has 144 divisors (see below), whose sum is σ = 721244160. Its totient is φ = 71884800.

The previous prime is 249239611. The next prime is 249239647. The reversal of 249239628 is 826932942.

249239628 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 969676 + ... + 969932.

It is an arithmetic number, because the mean of its divisors is an integer number (5008640).

Almost surely, 2^249239628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249239628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360622080).

249239628 is an abundant number, since it is smaller than the sum of its proper divisors (472004532).

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

249239628 is a wasteful number, since it uses less digits than its factorization.

249239628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 383 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 249239628 is about 15787.3249158938. The cubic root of 249239628 is about 629.3212038872.

The spelling of 249239628 in words is "two hundred forty-nine million, two hundred thirty-nine thousand, six hundred twenty-eight".