1694128872 has 32 divisors (see below), whose sum is σ = 4236804000. Its totient is φ = 564512064.

The previous prime is 1694128861. The next prime is 1694128949. The reversal of 1694128872 is 2788214961.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68478 + ... + 89874.

It is an arithmetic number, because the mean of its divisors is an integer number (132400125).

Almost surely, 2^1694128872 is an apocalyptic number.

1694128872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1694128872 is an abundant number, since it is smaller than the sum of its proper divisors (2542675128).

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

1694128872 is a wasteful number, since it uses less digits than its factorization.

1694128872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24705 (or 24701 counting only the distinct ones).

The product of its digits is 387072, while the sum is 48.

The square root of 1694128872 is about 41159.7967925013. The cubic root of 1694128872 is about 1192.1076674814.

The spelling of 1694128872 in words is "one billion, six hundred ninety-four million, one hundred twenty-eight thousand, eight hundred seventy-two".