1045991232 has 560 divisors, whose sum is σ = 3903463872. Its totient is φ = 272056320.

The previous prime is 1045991213. The next prime is 1045991237. The reversal of 1045991232 is 2321995401.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045991237) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12602263 + ... + 12602345.

Almost surely, 2^1045991232 is an apocalyptic number.

1045991232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1045991232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951731936).

1045991232 is an abundant number, since it is smaller than the sum of its proper divisors (2857472640).

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

1045991232 is a wasteful number, since it uses less digits than its factorization.

1045991232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1045991232 is about 32341.7877056912. The cubic root of 1045991232 is about 1015.1012160139.

The spelling of 1045991232 in words is "one billion, forty-five million, nine hundred ninety-one thousand, two hundred thirty-two".