9993780 has 120 divisors (see below), whose sum is σ = 32524800. Its totient is φ = 2566080.

The previous prime is 9993769. The next prime is 9993793. The reversal of 9993780 is 873999.

It is a happy number.

9993780 is nontrivially palindromic in base 8.

9993780 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 50121 + ... + 50319.

It is an arithmetic number, because the mean of its divisors is an integer number (271040).

Almost surely, 2^9993780 is an apocalyptic number.

9993780 is a gapful number since it is divisible by the number (90) 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 9993780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16262400).

9993780 is an abundant number, since it is smaller than the sum of its proper divisors (22531020).

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

9993780 is a wasteful number, since it uses less digits than its factorization.

9993780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 9993780 is about 3161.2940388392. The cubic root of 9993780 is about 215.3987911261.

The spelling of 9993780 in words is "nine million, nine hundred ninety-three thousand, seven hundred eighty".