2235978 has 32 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 728640.

The previous prime is 2235973. The next prime is 2235997. The reversal of 2235978 is 8795322.

It is a happy number.

It is a d-powerful number, because it can be written as 2¹³ + 2²¹ + 3⁹ + 5⁷ + 9 + 7² + 8⁵ .

It is not an unprimeable number, because it can be changed into a prime (2235971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2098 + ... + 2978.

It is an arithmetic number, because the mean of its divisors is an integer number (158760).

2^2235978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2235978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

2235978 is an abundant number, since it is smaller than the sum of its proper divisors (2844342).

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

2235978 is a wasteful number, since it uses less digits than its factorization.

2235978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 933 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2235978 is about 1495.3186951282. The cubic root of 2235978 is about 130.7642946056.

The spelling of 2235978 in words is "two million, two hundred thirty-five thousand, nine hundred seventy-eight".