1072643456 has 32 divisors (see below), whose sum is σ = 2229822000. Its totient is φ = 513001984.

The previous prime is 1072643417. The next prime is 1072643491. The reversal of 1072643456 is 6543462701.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179231 + ... + 185118.

Almost surely, 2^1072643456 is an apocalyptic number.

1072643456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1072643456 is an abundant number, since it is smaller than the sum of its proper divisors (1157178544).

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

1072643456 is an equidigital number, since it uses as much as digits as its factorization.

1072643456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364386 (or 364374 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 1072643456 is about 32751.2359461441. The cubic root of 1072643456 is about 1023.6507190918.

The spelling of 1072643456 in words is "one billion, seventy-two million, six hundred forty-three thousand, four hundred fifty-six".