2839440 has 40 divisors (see below), whose sum is σ = 8803008. Its totient is φ = 757120.

The previous prime is 2839433. The next prime is 2839451. The reversal of 2839440 is 449382.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2839398 and 2839407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5676 + ... + 6155.

2^2839440 is an apocalyptic number.

2839440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2839440 is an abundant number, since it is smaller than the sum of its proper divisors (5963568).

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

2839440 is a wasteful number, since it uses less digits than its factorization.

2839440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11847 (or 11841 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2839440 is about 1685.0637970119. The cubic root of 2839440 is about 141.6046664490.

The spelling of 2839440 in words is "two million, eight hundred thirty-nine thousand, four hundred forty".