1670394768 has 80 divisors (see below), whose sum is σ = 4939017216. Its totient is φ = 476542080.

The previous prime is 1670394763. The next prime is 1670394779. The reversal of 1670394768 is 8674930761.

It is a self number, because there is not a number n which added to its sum of digits gives 1670394768.

It is not an unprimeable number, because it can be changed into a prime (1670394763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246303 + ... + 252993.

Almost surely, 2^1670394768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1670394768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2469508608).

1670394768 is an abundant number, since it is smaller than the sum of its proper divisors (3268622448).

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

1670394768 is a wasteful number, since it uses less digits than its factorization.

1670394768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452 (or 7446 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 1670394768 is about 40870.4632711693. The cubic root of 1670394768 is about 1186.5144737415.

The spelling of 1670394768 in words is "one billion, six hundred seventy million, three hundred ninety-four thousand, seven hundred sixty-eight".