249157930 has 16 divisors (see below), whose sum is σ = 512553600. Its totient is φ = 85425552.

The previous prime is 249157897. The next prime is 249157991. The reversal of 249157930 is 39751942.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779630 + ... + 1779769.

It is an arithmetic number, because the mean of its divisors is an integer number (32034600).

Almost surely, 2^249157930 is an apocalyptic number.

249157930 is an abundant number, since it is smaller than the sum of its proper divisors (263395670).

249157930 is a wasteful number, since it uses less digits than its factorization.

249157930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559413.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 249157930 is about 15784.7372483675. The cubic root of 249157930 is about 629.2524348571.

The spelling of 249157930 in words is "two hundred forty-nine million, one hundred fifty-seven thousand, nine hundred thirty".