1993345940 has 24 divisors (see below), whose sum is σ = 4187712480. Its totient is φ = 797017248.

The previous prime is 1993345903. The next prime is 1993345951. The reversal of 1993345940 is 495433991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34439 + ... + 71921.

It is an arithmetic number, because the mean of its divisors is an integer number (174488020).

Almost surely, 2^1993345940 is an apocalyptic number.

1993345940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1993345940 is an abundant number, since it is smaller than the sum of its proper divisors (2194366540).

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

1993345940 is a wasteful number, since it uses less digits than its factorization.

1993345940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40151 (or 40149 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 1993345940 is about 44646.9029161038. The cubic root of 1993345940 is about 1258.5222323999.

The spelling of 1993345940 in words is "one billion, nine hundred ninety-three million, three hundred forty-five thousand, nine hundred forty".