1047991552 has 36 divisors (see below), whose sum is σ = 2148446356. Its totient is φ = 509829120.

The previous prime is 1047991523. The next prime is 1047991603. The reversal of 1047991552 is 2551997401.

It can be written as a sum of positive squares in 2 ways, for example, as 730296576 + 317694976 = 27024^2 + 17824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1047991499 and 1047991508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45849 + ... + 64792.

Almost surely, 2^1047991552 is an apocalyptic number.

It is an amenable number.

1047991552 is an abundant number, since it is smaller than the sum of its proper divisors (1100454804).

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

1047991552 is an equidigital number, since it uses as much as digits as its factorization.

1047991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110694 (or 110680 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 43.

The square root of 1047991552 is about 32372.6976324186. The cubic root of 1047991552 is about 1015.7478862740.

The spelling of 1047991552 in words is "one billion, forty-seven million, nine hundred ninety-one thousand, five hundred fifty-two".