1321872048 has 100 divisors (see below), whose sum is σ = 4372465680. Its totient is φ = 377675136.

The previous prime is 1321872017. The next prime is 1321872091. The reversal of 1321872048 is 8402781231.

It is a super-2 number, since 2×1321872048² = 3494691422567428608, 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 19 ways as a sum of consecutive naturals, for example, 63783 + ... + 81926.

Almost surely, 2^1321872048 is an apocalyptic number.

1321872048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1321872048 is an abundant number, since it is smaller than the sum of its proper divisors (3050593632).

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

1321872048 is a wasteful number, since it uses less digits than its factorization.

1321872048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145736 (or 145721 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1321872048 is about 36357.5583338595. The cubic root of 1321872048 is about 1097.4796423529.

The spelling of 1321872048 in words is "one billion, three hundred twenty-one million, eight hundred seventy-two thousand, forty-eight".