247375988 has 6 divisors (see below), whose sum is σ = 432907986. Its totient is φ = 123687992.

The previous prime is 247375957. The next prime is 247376011. The reversal of 247375988 is 889573742.

It can be written as a sum of positive squares in only one way, i.e., 133356304 + 114019684 = 11548^2 + 10678^2 .

It is a super-2 number, since 2×247375988² = 122389758877952288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30921995 + ... + 30922002.

It is an arithmetic number, because the mean of its divisors is an integer number (72151331).

Almost surely, 2^247375988 is an apocalyptic number.

It is an amenable number.

247375988 is a deficient number, since it is larger than the sum of its proper divisors (185531998).

247375988 is a wasteful number, since it uses less digits than its factorization.

247375988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61844001 (or 61843999 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 53.

The square root of 247375988 is about 15728.1908686282. The cubic root of 247375988 is about 627.7487364875.

The spelling of 247375988 in words is "two hundred forty-seven million, three hundred seventy-five thousand, nine hundred eighty-eight".