993905620 has 12 divisors (see below), whose sum is σ = 2087201844. Its totient is φ = 397562240.

The previous prime is 993905593. The next prime is 993905623. The reversal of 993905620 is 26509399.

It can be written as a sum of positive squares in 2 ways, for example, as 150700176 + 843205444 = 12276^2 + 29038^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993905623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24847621 + ... + 24847660.

It is an arithmetic number, because the mean of its divisors is an integer number (173933487).

Almost surely, 2^993905620 is an apocalyptic number.

It is an amenable number.

993905620 is an abundant number, since it is smaller than the sum of its proper divisors (1093296224).

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

993905620 is a wasteful number, since it uses less digits than its factorization.

993905620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49695290 (or 49695288 counting only the distinct ones).

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

The square root of 993905620 is about 31526.2687294263. The cubic root of 993905620 is about 997.9643991408.

The spelling of 993905620 in words is "nine hundred ninety-three million, nine hundred five thousand, six hundred twenty".