249481020 has 48 divisors (see below), whose sum is σ = 735315840. Its totient is φ = 63026496.

The previous prime is 249480991. The next prime is 249481049. The reversal of 249481020 is 20184942.

It is an interprime number because it is at equal distance from previous prime (249480991) and next prime (249481049).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108282 + ... + 110561.

It is an arithmetic number, because the mean of its divisors is an integer number (15319080).

Almost surely, 2^249481020 is an apocalyptic number.

249481020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249481020 is an abundant number, since it is smaller than the sum of its proper divisors (485834820).

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

249481020 is a wasteful number, since it uses less digits than its factorization.

249481020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218874 (or 218872 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 249481020 is about 15794.9681861028. The cubic root of 249481020 is about 629.5243070726.

The spelling of 249481020 in words is "two hundred forty-nine million, four hundred eighty-one thousand, twenty".