2640554 has 16 divisors (see below), whose sum is σ = 4624128. Its totient is φ = 1107312.

The previous prime is 2640551. The next prime is 2640571. The reversal of 2640554 is 4550462.

It is not an unprimeable number, because it can be changed into a prime (2640551) 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, 1349 + ... + 2664.

It is an arithmetic number, because the mean of its divisors is an integer number (289008).

2^2640554 is an apocalyptic number.

2640554 is a deficient number, since it is larger than the sum of its proper divisors (1983574).

2640554 is a wasteful number, since it uses less digits than its factorization.

2640554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2640554 is about 1624.9781536993. The cubic root of 2640554 is about 138.2181315364.

The spelling of 2640554 in words is "two million, six hundred forty thousand, five hundred fifty-four".