1428117664 has 24 divisors (see below), whose sum is σ = 2813971860. Its totient is φ = 713458176.

The previous prime is 1428117659. The next prime is 1428117689. The reversal of 1428117664 is 4667118241.

It can be written as a sum of positive squares in 2 ways, for example, as 1405650064 + 22467600 = 37492^2 + 4740^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 21172 + ... + 57484.

Almost surely, 2^1428117664 is an apocalyptic number.

It is an amenable number.

1428117664 is a deficient number, since it is larger than the sum of its proper divisors (1385854196).

1428117664 is a wasteful number, since it uses less digits than its factorization.

1428117664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37552 (or 37544 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 1428117664 is about 37790.4440831277. Note that the first 3 decimals coincide. The cubic root of 1428117664 is about 1126.1286224923.

The spelling of 1428117664 in words is "one billion, four hundred twenty-eight million, one hundred seventeen thousand, six hundred sixty-four".