247749872 has 20 divisors (see below), whose sum is σ = 480389640. Its totient is φ = 123778368.

The previous prime is 247749793. The next prime is 247749877. The reversal of 247749872 is 278947742.

247749872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247749872² = 122759998152032768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247749872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247749877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18038 + ... + 28650.

It is an arithmetic number, because the mean of its divisors is an integer number (24019482).

Almost surely, 2^247749872 is an apocalyptic number.

It is an amenable number.

247749872 is a deficient number, since it is larger than the sum of its proper divisors (232639768).

247749872 is a wasteful number, since it uses less digits than its factorization.

247749872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080 (or 12074 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

The square root of 247749872 is about 15740.0721726427. The cubic root of 247749872 is about 628.0648370452.

The spelling of 247749872 in words is "two hundred forty-seven million, seven hundred forty-nine thousand, eight hundred seventy-two".