249371390 has 32 divisors (see below), whose sum is σ = 473796000. Its totient is φ = 94238208.

The previous prime is 249371363. The next prime is 249371407. The reversal of 249371390 is 93173942.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76106 + ... + 79314.

It is an arithmetic number, because the mean of its divisors is an integer number (14806125).

Almost surely, 2^249371390 is an apocalyptic number.

249371390 is a deficient number, since it is larger than the sum of its proper divisors (224424610).

249371390 is a wasteful number, since it uses less digits than its factorization.

249371390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3644.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 249371390 is about 15791.4973957507. The cubic root of 249371390 is about 629.4320824732.

The spelling of 249371390 in words is "two hundred forty-nine million, three hundred seventy-one thousand, three hundred ninety".