247939020 has 108 divisors (see below), whose sum is σ = 874901664. Its totient is φ = 56669760.

The previous prime is 247939019. The next prime is 247939073. The reversal of 247939020 is 20939742.

247939020 is a `hidden beast` number, since 247 + 9 + 390 + 20 = 666.

It is a super-2 number, since 2×247939020² = 122947515277120800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5236 + ... + 22875.

Almost surely, 2^247939020 is an apocalyptic number.

247939020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247939020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437450832).

247939020 is an abundant number, since it is smaller than the sum of its proper divisors (626962644).

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

247939020 is a wasteful number, since it uses less digits than its factorization.

247939020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28140 (or 28128 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 247939020 is about 15746.0795120563. The cubic root of 247939020 is about 628.2246312592.

The spelling of 247939020 in words is "two hundred forty-seven million, nine hundred thirty-nine thousand, twenty".