2945440 has 48 divisors (see below), whose sum is σ = 7144200. Its totient is φ = 1146880.

The previous prime is 2945429. The next prime is 2945441. The reversal of 2945440 is 445492.

It can be written as a sum of positive squares in 4 ways, for example, as 1752976 + 1192464 = 1324^2 + 1092^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2945399 and 2945408.

It is not an unprimeable number, because it can be changed into a prime (2945441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6336 + ... + 6784.

2^2945440 is an apocalyptic number.

2945440 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 2945440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3572100).

2945440 is an abundant number, since it is smaller than the sum of its proper divisors (4198760).

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

2945440 is a wasteful number, since it uses less digits than its factorization.

2945440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2945440 is about 1716.2284230253. The cubic root of 2945440 is about 143.3452787352.

The spelling of 2945440 in words is "two million, nine hundred forty-five thousand, four hundred forty".