2159730 has 64 divisors (see below), whose sum is σ = 6076800. Its totient is φ = 544320.

The previous prime is 2159719. The next prime is 2159767. The reversal of 2159730 is 379512.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2159694 and 2159703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4920 + ... + 5340.

It is an arithmetic number, because the mean of its divisors is an integer number (94950).

2^2159730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2159730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038400).

2159730 is an abundant number, since it is smaller than the sum of its proper divisors (3917070).

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

2159730 is a wasteful number, since it uses less digits than its factorization.

2159730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 2159730 is about 1469.6019869339. The cubic root of 2159730 is about 129.2606950908.

The spelling of 2159730 in words is "two million, one hundred fifty-nine thousand, seven hundred thirty".