247890404 has 12 divisors (see below), whose sum is σ = 434008764. Its totient is φ = 123887904.

The previous prime is 247890341. The next prime is 247890437. The reversal of 247890404 is 404098742.

It can be written as a sum of positive squares in 2 ways, for example, as 166926400 + 80964004 = 12920^2 + 8998^2 .

It is a super-2 number, since 2×247890404² = 122899304790566432, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3719 + ... + 22574.

It is an arithmetic number, because the mean of its divisors is an integer number (36167397).

Almost surely, 2^247890404 is an apocalyptic number.

It is an amenable number.

247890404 is a deficient number, since it is larger than the sum of its proper divisors (186118360).

247890404 is a wasteful number, since it uses less digits than its factorization.

247890404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28654 (or 28652 counting only the distinct ones).

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

The square root of 247890404 is about 15744.5356870249. The cubic root of 247890404 is about 628.1835677144.

The spelling of 247890404 in words is "two hundred forty-seven million, eight hundred ninety thousand, four hundred four".