1690246836 has 18 divisors (see below), whose sum is σ = 4272568482. Its totient is φ = 563415600.

The previous prime is 1690246829. The next prime is 1690246837. The reversal of 1690246836 is 6386420961.

It can be written as a sum of positive squares in only one way, i.e., 1128556836 + 561690000 = 33594^2 + 23700^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1690246791 and 1690246800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690246837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23475615 + ... + 23475686.

Almost surely, 2^1690246836 is an apocalyptic number.

It is an amenable number.

1690246836 is an abundant number, since it is smaller than the sum of its proper divisors (2582321646).

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

1690246836 is a wasteful number, since it uses less digits than its factorization.

1690246836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46951311 (or 46951306 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1690246836 is about 41112.6116416848. The cubic root of 1690246836 is about 1191.1964136641.

The spelling of 1690246836 in words is "one billion, six hundred ninety million, two hundred forty-six thousand, eight hundred thirty-six".