1690791746 has 32 divisors (see below), whose sum is σ = 3131654400. Its totient is φ = 681995328.

The previous prime is 1690791737. The next prime is 1690791749. The reversal of 1690791746 is 6471970961.

It is a junction number, because it is equal to n+sod(n) for n = 1690791694 and 1690791703.

It is not an unprimeable number, because it can be changed into a prime (1690791749) 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, 60830 + ... + 84153.

It is an arithmetic number, because the mean of its divisors is an integer number (97864200).

Almost surely, 2^1690791746 is an apocalyptic number.

1690791746 is a deficient number, since it is larger than the sum of its proper divisors (1440862654).

1690791746 is a wasteful number, since it uses less digits than its factorization.

1690791746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145023 (or 145009 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 1690791746 is about 41119.2381495572. The cubic root of 1690791746 is about 1191.3244078094.

The spelling of 1690791746 in words is "one billion, six hundred ninety million, seven hundred ninety-one thousand, seven hundred forty-six".