1690668038 has 24 divisors (see below), whose sum is σ = 2661594768. Its totient is φ = 803920832.

The previous prime is 1690668011. The next prime is 1690668097. The reversal of 1690668038 is 8308660961.

It is a junction number, because it is equal to n+sod(n) for n = 1690667983 and 1690668001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2496956 + ... + 2497632.

It is an arithmetic number, because the mean of its divisors is an integer number (110899782).

Almost surely, 2^1690668038 is an apocalyptic number.

1690668038 is a deficient number, since it is larger than the sum of its proper divisors (970926730).

1690668038 is an equidigital number, since it uses as much as digits as its factorization.

1690668038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 1690668038 is about 41117.7338626535. The cubic root of 1690668038 is about 1191.2953523971.

The spelling of 1690668038 in words is "one billion, six hundred ninety million, six hundred sixty-eight thousand, thirty-eight".