2640458 has 8 divisors (see below), whose sum is σ = 4052928. Its totient is φ = 1289484.

The previous prime is 2640409. The next prime is 2640497. The reversal of 2640458 is 8540462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2640458.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15266 + ... + 15437.

It is an arithmetic number, because the mean of its divisors is an integer number (506616).

2^2640458 is an apocalyptic number.

2640458 is a deficient number, since it is larger than the sum of its proper divisors (1412470).

2640458 is a wasteful number, since it uses less digits than its factorization.

2640458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30748.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2640458 is about 1624.9486145722. The cubic root of 2640458 is about 138.2164564963.

It can be divided in two parts, 26404 and 58, that added together give a palindrome (26462).

The spelling of 2640458 in words is "two million, six hundred forty thousand, four hundred fifty-eight".