1993439500 has 144 divisors (see below), whose sum is σ = 4872801024. Its totient is φ = 711360000.

The previous prime is 1993439479. The next prime is 1993439521. The reversal of 1993439500 is 59343991.

It is an interprime number because it is at equal distance from previous prime (1993439479) and next prime (1993439521).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2619120 + ... + 2619880.

It is an arithmetic number, because the mean of its divisors is an integer number (33838896).

Almost surely, 2^1993439500 is an apocalyptic number.

1993439500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1993439500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436400512).

1993439500 is an abundant number, since it is smaller than the sum of its proper divisors (2879361524).

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

1993439500 is a wasteful number, since it uses less digits than its factorization.

1993439500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 1993439500 is about 44647.9506808543. The cubic root of 1993439500 is about 1258.5419221580.

The spelling of 1993439500 in words is "one billion, nine hundred ninety-three million, four hundred thirty-nine thousand, five hundred".