2235720 has 64 divisors (see below), whose sum is σ = 6935040. Its totient is φ = 576000.

The previous prime is 2235707. The next prime is 2235731. The reversal of 2235720 is 275322.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3420 + ... + 4020.

It is an arithmetic number, because the mean of its divisors is an integer number (108360).

2^2235720 is an apocalyptic number.

2235720 is a gapful number since it is divisible by the number (20) 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 2235720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3467520).

2235720 is an abundant number, since it is smaller than the sum of its proper divisors (4699320).

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

2235720 is a wasteful number, since it uses less digits than its factorization.

2235720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 2235720 is about 1495.2324234045. The cubic root of 2235720 is about 130.7592649667.

The spelling of 2235720 in words is "two million, two hundred thirty-five thousand, seven hundred twenty".