1690020812 has 12 divisors (see below), whose sum is σ = 2961118440. Its totient is φ = 843986976.

The previous prime is 1690020781. The next prime is 1690020869. The reversal of 1690020812 is 2180200961.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252137 + ... + 258752.

It is an arithmetic number, because the mean of its divisors is an integer number (246759870).

Almost surely, 2^1690020812 is an apocalyptic number.

It is an amenable number.

1690020812 is a deficient number, since it is larger than the sum of its proper divisors (1271097628).

1690020812 is a wasteful number, since it uses less digits than its factorization.

1690020812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511720 (or 511718 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1690020812 is about 41109.8627095737. The cubic root of 1690020812 is about 1191.1433147174.

The spelling of 1690020812 in words is "one billion, six hundred ninety million, twenty thousand, eight hundred twelve".