1043645472 has 240 divisors, whose sum is σ = 3200928192. Its totient is φ = 333365760.

The previous prime is 1043645467. The next prime is 1043645501. The reversal of 1043645472 is 2745463401.

1043645472 is a `hidden beast` number, since 1 + 0 + 4 + 3 + 645 + 4 + 7 + 2 = 666.

It is a super-2 number, since 2×1043645472² = 2178391742452205568, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9753643 + ... + 9753749.

Almost surely, 2^1043645472 is an apocalyptic number.

1043645472 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 1043645472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600464096).

1043645472 is an abundant number, since it is smaller than the sum of its proper divisors (2157282720).

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

1043645472 is a wasteful number, since it uses less digits than its factorization.

1043645472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 1043645472 is about 32305.5021938988. The cubic root of 1043645472 is about 1014.3418195658.

The spelling of 1043645472 in words is "one billion, forty-three million, six hundred forty-five thousand, four hundred seventy-two".