2638040 has 16 divisors (see below), whose sum is σ = 5935680. Its totient is φ = 1055200.

The previous prime is 2638039. The next prime is 2638057. The reversal of 2638040 is 408362.

2638040 = T₃₄₃ + T₃₄₄ + ... + T₃₈₂.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2637997 and 2638015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32936 + ... + 33015.

It is an arithmetic number, because the mean of its divisors is an integer number (370980).

2^2638040 is an apocalyptic number.

2638040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2638040 is an abundant number, since it is smaller than the sum of its proper divisors (3297640).

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

2638040 is a wasteful number, since it uses less digits than its factorization.

2638040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65962 (or 65958 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2638040 is about 1624.2044206318. The cubic root of 2638040 is about 138.1742530275.

The spelling of 2638040 in words is "two million, six hundred thirty-eight thousand, forty".