1428073664 has 28 divisors (see below), whose sum is σ = 2837002200. Its totient is φ = 713238528.

The previous prime is 1428073631. The next prime is 1428073693. The reversal of 1428073664 is 4663708241.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47447 + ... + 71465.

Almost surely, 2^1428073664 is an apocalyptic number.

It is an amenable number.

1428073664 is a deficient number, since it is larger than the sum of its proper divisors (1408928536).

1428073664 is an equidigital number, since it uses as much as digits as its factorization.

1428073664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24960 (or 24950 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 1428073664 is about 37789.8619208909. The cubic root of 1428073664 is about 1126.1170571128.

The spelling of 1428073664 in words is "one billion, four hundred twenty-eight million, seventy-three thousand, six hundred sixty-four".