1321628372 has 24 divisors (see below), whose sum is σ = 2435815200. Its totient is φ = 625716576.

The previous prime is 1321628359. The next prime is 1321628383. The reversal of 1321628372 is 2738261231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222254 + ... + 228122.

It is an arithmetic number, because the mean of its divisors is an integer number (101492300).

Almost surely, 2^1321628372 is an apocalyptic number.

It is an amenable number.

1321628372 is a deficient number, since it is larger than the sum of its proper divisors (1114186828).

1321628372 is a wasteful number, since it uses less digits than its factorization.

1321628372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8855 (or 8853 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 1321628372 is about 36354.2070742851. The cubic root of 1321628372 is about 1097.4122011599.

The spelling of 1321628372 in words is "one billion, three hundred twenty-one million, six hundred twenty-eight thousand, three hundred seventy-two".