247122828 has 18 divisors (see below), whose sum is σ = 624671684. Its totient is φ = 82374264.

The previous prime is 247122817. The next prime is 247122839. The reversal of 247122828 is 828221742.

It is an interprime number because it is at equal distance from previous prime (247122817) and next prime (247122839).

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×247122828² = 122139384237435168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6864523 = 247122828 / (2 + 4 + 7 + 1 + 2 + 2 + 8 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 247122792 and 247122801.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3432226 + ... + 3432297.

Almost surely, 2^247122828 is an apocalyptic number.

It is an amenable number.

247122828 is an abundant number, since it is smaller than the sum of its proper divisors (377548856).

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

247122828 is a wasteful number, since it uses less digits than its factorization.

247122828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6864533 (or 6864528 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 247122828 is about 15720.1408390638. The cubic root of 247122828 is about 627.5345212565.

The spelling of 247122828 in words is "two hundred forty-seven million, one hundred twenty-two thousand, eight hundred twenty-eight".