1930401668 has 24 divisors (see below), whose sum is σ = 3639890520. Its totient is φ = 890507520.

The previous prime is 1930401631. The next prime is 1930401727. The reversal of 1930401668 is 8661040391.

It can be written as a sum of positive squares in 4 ways, for example, as 44063044 + 1886338624 = 6638^2 + 43432^2 .

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, 109808 + ... + 126168.

It is an arithmetic number, because the mean of its divisors is an integer number (151662105).

Almost surely, 2^1930401668 is an apocalyptic number.

It is an amenable number.

1930401668 is a deficient number, since it is larger than the sum of its proper divisors (1709488852).

1930401668 is a wasteful number, since it uses less digits than its factorization.

1930401668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18647 (or 18645 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 1930401668 is about 43936.3365336711. The cubic root of 1930401668 is about 1245.1334336538.

The spelling of 1930401668 in words is "one billion, nine hundred thirty million, four hundred one thousand, six hundred sixty-eight".