249027870 has 128 divisors (see below), whose sum is σ = 774466560. Its totient is φ = 49766400.

The previous prime is 249027847. The next prime is 249027899. The reversal of 249027870 is 78720942.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 63 ways as a sum of consecutive naturals, for example, 49470 + ... + 54270.

It is an arithmetic number, because the mean of its divisors is an integer number (6050520).

Almost surely, 2^249027870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 249027870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387233280).

249027870 is an abundant number, since it is smaller than the sum of its proper divisors (525438690).

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

249027870 is a wasteful number, since it uses less digits than its factorization.

249027870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 249027870 is about 15780.6169080933. The cubic root of 249027870 is about 629.1429262468.

The spelling of 249027870 in words is "two hundred forty-nine million, twenty-seven thousand, eight hundred seventy".