247973240 has 16 divisors (see below), whose sum is σ = 557939880. Its totient is φ = 99189280.

The previous prime is 247973213. The next prime is 247973263. The reversal of 247973240 is 42379742.

It is a super-2 number, since 2×247973240² = 122981455512195200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247973194 and 247973203.

It is a congruent number.

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, 3099626 + ... + 3099705.

Almost surely, 2^247973240 is an apocalyptic number.

247973240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247973240 is an abundant number, since it is smaller than the sum of its proper divisors (309966640).

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

247973240 is a wasteful number, since it uses less digits than its factorization.

247973240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199342 (or 6199338 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 247973240 is about 15747.1660942533. The cubic root of 247973240 is about 628.2535319917.

The spelling of 247973240 in words is "two hundred forty-seven million, nine hundred seventy-three thousand, two hundred forty".