1690694604 has 36 divisors (see below), whose sum is σ = 4291603680. Its totient is φ = 561204000.

The previous prime is 1690694569. The next prime is 1690694609. The reversal of 1690694604 is 4064960961.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1690694604.

It is not an unprimeable number, because it can be changed into a prime (1690694609) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 89647 + ... + 106854.

Almost surely, 2^1690694604 is an apocalyptic number.

It is an amenable number.

1690694604 is an abundant number, since it is smaller than the sum of its proper divisors (2600909076).

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

1690694604 is a wasteful number, since it uses less digits than its factorization.

1690694604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196750 (or 196745 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1690694604 is about 41118.0569093434. The cubic root of 1690694604 is about 1191.3015920975.

The spelling of 1690694604 in words is "one billion, six hundred ninety million, six hundred ninety-four thousand, six hundred four".