247528988 has 18 divisors (see below), whose sum is σ = 503898696. Its totient is φ = 106083768.

The previous prime is 247528973. The next prime is 247529003. The reversal of 247528988 is 889825742.

It is an interprime number because it is at equal distance from previous prime (247528973) and next prime (247529003).

It is a super-2 number, since 2×247528988² = 122541199800608288, 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 in 5 ways as a sum of consecutive naturals, for example, 631256 + ... + 631647.

It is an arithmetic number, because the mean of its divisors is an integer number (27994372).

Almost surely, 2^247528988 is an apocalyptic number.

247528988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

247528988 is an abundant number, since it is smaller than the sum of its proper divisors (256369708).

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

247528988 is a wasteful number, since it uses less digits than its factorization.

247528988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262921 (or 1262912 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 53.

The square root of 247528988 is about 15733.0539946954. The cubic root of 247528988 is about 627.8781289467.

The spelling of 247528988 in words is "two hundred forty-seven million, five hundred twenty-eight thousand, nine hundred eighty-eight".