1693387820 has 12 divisors (see below), whose sum is σ = 3556114464. Its totient is φ = 677355120.

The previous prime is 1693387819. The next prime is 1693387823. The reversal of 1693387820 is 287833961.

It is not an unprimeable number, because it can be changed into a prime (1693387823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42334676 + ... + 42334715.

It is an arithmetic number, because the mean of its divisors is an integer number (296342872).

Almost surely, 2^1693387820 is an apocalyptic number.

1693387820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1693387820 is an abundant number, since it is smaller than the sum of its proper divisors (1862726644).

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

1693387820 is a wasteful number, since it uses less digits than its factorization.

1693387820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84669400 (or 84669398 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1693387820 is about 41150.7936739986. The cubic root of 1693387820 is about 1191.9338234435.

The spelling of 1693387820 in words is "one billion, six hundred ninety-three million, three hundred eighty-seven thousand, eight hundred twenty".