1690492956 has 12 divisors (see below), whose sum is σ = 3944483592. Its totient is φ = 563497648.

The previous prime is 1690492949. The next prime is 1690492987. The reversal of 1690492956 is 6592940961.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1690492899 and 1690492908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70437195 + ... + 70437218.

It is an arithmetic number, because the mean of its divisors is an integer number (328706966).

Almost surely, 2^1690492956 is an apocalyptic number.

It is an amenable number.

1690492956 is an abundant number, since it is smaller than the sum of its proper divisors (2253990636).

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

1690492956 is a wasteful number, since it uses less digits than its factorization.

1690492956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140874420 (or 140874418 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 51.

The square root of 1690492956 is about 41115.6047748297. The cubic root of 1690492956 is about 1191.2542283032.

The spelling of 1690492956 in words is "one billion, six hundred ninety million, four hundred ninety-two thousand, nine hundred fifty-six".