1405642672 has 40 divisors (see below), whose sum is σ = 3212905472. Its totient is φ = 582984000.

The previous prime is 1405642657. The next prime is 1405642697. The reversal of 1405642672 is 2762465041.

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, 198954 + ... + 205897.

Almost surely, 2^1405642672 is an apocalyptic number.

It is an amenable number.

1405642672 is an abundant number, since it is smaller than the sum of its proper divisors (1807262800).

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

1405642672 is a wasteful number, since it uses less digits than its factorization.

1405642672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404897 (or 404891 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 1405642672 is about 37491.9014188398. The cubic root of 1405642672 is about 1120.1898785215.

The spelling of 1405642672 in words is "one billion, four hundred five million, six hundred forty-two thousand, six hundred seventy-two".