1691910140 has 24 divisors (see below), whose sum is σ = 3557736672. Its totient is φ = 675864000.

The previous prime is 1691910127. The next prime is 1691910151. The reversal of 1691910140 is 410191961.

It is a junction number, because it is equal to n+sod(n) for n = 1691910097 and 1691910106.

It is a congruent number.

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, 40736 + ... + 71015.

It is an arithmetic number, because the mean of its divisors is an integer number (148239028).

Almost surely, 2^1691910140 is an apocalyptic number.

1691910140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1691910140 is an abundant number, since it is smaller than the sum of its proper divisors (1865826532).

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

1691910140 is a wasteful number, since it uses less digits than its factorization.

1691910140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112517 (or 112515 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 1691910140 is about 41132.8353022254. The cubic root of 1691910140 is about 1191.5870217417.

The spelling of 1691910140 in words is "one billion, six hundred ninety-one million, nine hundred ten thousand, one hundred forty".