1690138352 has 80 divisors (see below), whose sum is σ = 3894607872. Its totient is φ = 695278080.

The previous prime is 1690138337. The next prime is 1690138381. The reversal of 1690138352 is 2538310961.

It is a happy number.

It is a congruent number.

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, 439028 + ... + 442860.

Almost surely, 2^1690138352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1690138352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1947303936).

1690138352 is an abundant number, since it is smaller than the sum of its proper divisors (2204469520).

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

1690138352 is a wasteful number, since it uses less digits than its factorization.

1690138352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006 (or 4000 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1690138352 is about 41111.2922686699. The cubic root of 1690138352 is about 1191.1709285271.

The spelling of 1690138352 in words is "one billion, six hundred ninety million, one hundred thirty-eight thousand, three hundred fifty-two".