1690738764 has 48 divisors (see below), whose sum is σ = 4634757120. Its totient is φ = 472933440.

The previous prime is 1690738727. The next prime is 1690738789. The reversal of 1690738764 is 4678370961.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490924 + ... + 494355.

It is an arithmetic number, because the mean of its divisors is an integer number (96557440).

Almost surely, 2^1690738764 is an apocalyptic number.

It is an amenable number.

1690738764 is an abundant number, since it is smaller than the sum of its proper divisors (2944018356).

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

1690738764 is a wasteful number, since it uses less digits than its factorization.

1690738764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985310 (or 985308 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 1690738764 is about 41118.5938961925. The cubic root of 1690738764 is about 1191.3119640516.

The spelling of 1690738764 in words is "one billion, six hundred ninety million, seven hundred thirty-eight thousand, seven hundred sixty-four".