1690021792 has 24 divisors (see below), whose sum is σ = 3434562432. Its totient is φ = 817752000.

The previous prime is 1690021787. The next prime is 1690021831. The reversal of 1690021792 is 2971200961.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

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 3 ways as a sum of consecutive naturals, for example, 850834 + ... + 852817.

It is an arithmetic number, because the mean of its divisors is an integer number (143106768).

Almost surely, 2^1690021792 is an apocalyptic number.

It is an amenable number.

1690021792 is an abundant number, since it is smaller than the sum of its proper divisors (1744540640).

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

1690021792 is a wasteful number, since it uses less digits than its factorization.

1690021792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703692 (or 1703684 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1690021792 is about 41109.8746288529. The cubic root of 1690021792 is about 1191.1435449552.

The spelling of 1690021792 in words is "one billion, six hundred ninety million, twenty-one thousand, seven hundred ninety-two".