1798640672 has 12 divisors (see below), whose sum is σ = 3541073886. Its totient is φ = 899320320.

The previous prime is 1798640663. The next prime is 1798640699. The reversal of 1798640672 is 2760468971.

It can be written as a sum of positive squares in only one way, i.e., 1452829456 + 345811216 = 38116^2 + 18596^2 .

It is a super-3 number, since 3×1798640672³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1798640672.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28103729 + ... + 28103792.

Almost surely, 2^1798640672 is an apocalyptic number.

It is an amenable number.

1798640672 is a deficient number, since it is larger than the sum of its proper divisors (1742433214).

1798640672 is an equidigital number, since it uses as much as digits as its factorization.

1798640672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56207531 (or 56207523 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1798640672 is about 42410.3840114659. The cubic root of 1798640672 is about 1216.1341106126.

The spelling of 1798640672 in words is "one billion, seven hundred ninety-eight million, six hundred forty thousand, six hundred seventy-two".