247044340 has 24 divisors (see below), whose sum is σ = 549311112. Its totient is φ = 93004800.

The previous prime is 247044319. The next prime is 247044341. The reversal of 247044340 is 43440742.

It can be written as a sum of positive squares in 4 ways, for example, as 38415204 + 208629136 = 6198^2 + 14444^2 .

It is a super-2 number, since 2×247044340² = 122061811852071200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247044299 and 247044308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247044341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362961 + ... + 363640.

It is an arithmetic number, because the mean of its divisors is an integer number (22887963).

Almost surely, 2^247044340 is an apocalyptic number.

247044340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247044340 is an abundant number, since it is smaller than the sum of its proper divisors (302266772).

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

247044340 is a wasteful number, since it uses less digits than its factorization.

247044340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726627 (or 726625 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 247044340 is about 15717.6442255193. The cubic root of 247044340 is about 627.4680777187.

The spelling of 247044340 in words is "two hundred forty-seven million, forty-four thousand, three hundred forty".