249654820 has 12 divisors (see below), whose sum is σ = 524275164. Its totient is φ = 99861920.

The previous prime is 249654721. The next prime is 249654833. The reversal of 249654820 is 28456942.

249654820 is digitally balanced in base 2, base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 189778176 + 59876644 = 13776^2 + 7738^2 .

249654820 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6241351 + ... + 6241390.

It is an arithmetic number, because the mean of its divisors is an integer number (43689597).

Almost surely, 2^249654820 is an apocalyptic number.

249654820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249654820 is an abundant number, since it is smaller than the sum of its proper divisors (274620344).

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

249654820 is a wasteful number, since it uses less digits than its factorization.

249654820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12482750 (or 12482748 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 249654820 is about 15800.4689803816. The cubic root of 249654820 is about 629.6704583742.

The spelling of 249654820 in words is "two hundred forty-nine million, six hundred fifty-four thousand, eight hundred twenty".