247942028 has 12 divisors (see below), whose sum is σ = 434076552. Its totient is φ = 123920160.

The previous prime is 247942027. The next prime is 247942031. The reversal of 247942028 is 820249742.

It is a super-2 number, since 2×247942028² = 122950498497505568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247941982 and 247942000.

It is not an unprimeable number, because it can be changed into a prime (247942027) 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, 425 + ... + 22272.

It is an arithmetic number, because the mean of its divisors is an integer number (36173046).

Almost surely, 2^247942028 is an apocalyptic number.

It is an amenable number.

247942028 is a deficient number, since it is larger than the sum of its proper divisors (186134524).

247942028 is a wasteful number, since it uses less digits than its factorization.

247942028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25432 (or 25430 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 247942028 is about 15746.1750276059. The cubic root of 247942028 is about 628.2271717925.

The spelling of 247942028 in words is "two hundred forty-seven million, nine hundred forty-two thousand, twenty-eight".