1993361540 has 12 divisors (see below), whose sum is σ = 4186059276. Its totient is φ = 797344608.

The previous prime is 1993361483. The next prime is 1993361561. The reversal of 1993361540 is 451633991.

It can be written as a sum of positive squares in 2 ways, for example, as 1496606596 + 496754944 = 38686^2 + 22288^2 .

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, 49834019 + ... + 49834058.

It is an arithmetic number, because the mean of its divisors is an integer number (348838273).

Almost surely, 2^1993361540 is an apocalyptic number.

1993361540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1993361540 is an abundant number, since it is smaller than the sum of its proper divisors (2192697736).

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

1993361540 is a wasteful number, since it uses less digits than its factorization.

1993361540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99668086 (or 99668084 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 1993361540 is about 44647.0776199294. The cubic root of 1993361540 is about 1258.5255154720.

The spelling of 1993361540 in words is "one billion, nine hundred ninety-three million, three hundred sixty-one thousand, five hundred forty".