993870 has 48 divisors (see below), whose sum is σ = 2686320. Its totient is φ = 264384.

The previous prime is 993869. The next prime is 993887. The reversal of 993870 is 78399.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2226 + ... + 2634.

It is an arithmetic number, because the mean of its divisors is an integer number (55965).

2⁹⁹³⁸⁷⁰ is an apocalyptic number.

993870 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 993870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343160).

993870 is an abundant number, since it is smaller than the sum of its proper divisors (1692450).

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

993870 is a wasteful number, since it uses less digits than its factorization.

993870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 993870 is about 996.9302884355. The cubic root of 993870 is about 99.7952477178.

It can be divided in two parts, 99 and 3870, that added together give a square (3969 = 63²).

The spelling of 993870 in words is "nine hundred ninety-three thousand, eight hundred seventy".