249487470 has 48 divisors (see below), whose sum is σ = 655976880. Its totient is φ = 65780352.

The previous prime is 249487453. The next prime is 249487471. The reversal of 249487470 is 74784942.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249487471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7564 + ... + 23583.

It is an arithmetic number, because the mean of its divisors is an integer number (13666185).

Almost surely, 2^249487470 is an apocalyptic number.

249487470 is an abundant number, since it is smaller than the sum of its proper divisors (406489410).

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

249487470 is a wasteful number, since it uses less digits than its factorization.

249487470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31249 (or 31246 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 249487470 is about 15795.1723637319. The cubic root of 249487470 is about 629.5297321971.

The spelling of 249487470 in words is "two hundred forty-nine million, four hundred eighty-seven thousand, four hundred seventy".