1693494890 has 32 divisors (see below), whose sum is σ = 3219289920. Its totient is φ = 639633024.

The previous prime is 1693494851. The next prime is 1693494917. The reversal of 1693494890 is 984943961.

It is a super-2 number, since 2×1693494890² = 5735849884912224200, which contains 22 as substring.

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, 43814 + ... + 72846.

It is an arithmetic number, because the mean of its divisors is an integer number (100602810).

Almost surely, 2^1693494890 is an apocalyptic number.

1693494890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1693494890 is a deficient number, since it is larger than the sum of its proper divisors (1525795030).

1693494890 is a wasteful number, since it uses less digits than its factorization.

1693494890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29366.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 1693494890 is about 41152.0946003967. The cubic root of 1693494890 is about 1191.9589442228.

The spelling of 1693494890 in words is "one billion, six hundred ninety-three million, four hundred ninety-four thousand, eight hundred ninety".