1690146404 has 6 divisors (see below), whose sum is σ = 2957756214. Its totient is φ = 845073200.

The previous prime is 1690146389. The next prime is 1690146449. The reversal of 1690146404 is 4046410961.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1603842304 + 86304100 = 40048^2 + 9290^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211268297 + ... + 211268304.

It is an arithmetic number, because the mean of its divisors is an integer number (492959369).

Almost surely, 2^1690146404 is an apocalyptic number.

It is an amenable number.

1690146404 is a deficient number, since it is larger than the sum of its proper divisors (1267609810).

1690146404 is a wasteful number, since it uses less digits than its factorization.

1690146404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422536605 (or 422536603 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1690146404 is about 41111.3901978515. The cubic root of 1690146404 is about 1191.1728201460.

The spelling of 1690146404 in words is "one billion, six hundred ninety million, one hundred forty-six thousand, four hundred four".