2939440 has 80 divisors (see below), whose sum is σ = 8124480. Its totient is φ = 967680.

The previous prime is 2939401. The next prime is 2939449. The reversal of 2939440 is 449392.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2939449) 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, 16150 + ... + 16330.

It is an arithmetic number, because the mean of its divisors is an integer number (101556).

2^2939440 is an apocalyptic number.

2939440 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 2939440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4062240).

2939440 is an abundant number, since it is smaller than the sum of its proper divisors (5185040).

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

2939440 is a wasteful number, since it uses less digits than its factorization.

2939440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 2939440 is about 1714.4795128551. The cubic root of 2939440 is about 143.2478788746.

The spelling of 2939440 in words is "two million, nine hundred thirty-nine thousand, four hundred forty".