921349620 has 96 divisors (see below), whose sum is σ = 2881751040. Its totient is φ = 244379520.

The previous prime is 921349613. The next prime is 921349621. The reversal of 921349620 is 26943129.

921349620 is a `hidden beast` number, since 9 + 21 + 3 + 4 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921349621) 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 31 ways as a sum of consecutive naturals, for example, 98674 + ... + 107606.

It is an arithmetic number, because the mean of its divisors is an integer number (30018240).

Almost surely, 2^921349620 is an apocalyptic number.

921349620 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 921349620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440875520).

921349620 is an abundant number, since it is smaller than the sum of its proper divisors (1960401420).

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

921349620 is a wasteful number, since it uses less digits than its factorization.

921349620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142 (or 9134 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 921349620 is about 30353.7414497785. The cubic root of 921349620 is about 973.0641827370.

The spelling of 921349620 in words is "nine hundred twenty-one million, three hundred forty-nine thousand, six hundred twenty".