2658404 has 36 divisors (see below), whose sum is σ = 5632704. Its totient is φ = 1075248.

The previous prime is 2658391. The next prime is 2658437. The reversal of 2658404 is 4048562.

It is a super-2 number, since 2×2658404² = 14134223654432, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 9977 + ... + 10239.

It is an arithmetic number, because the mean of its divisors is an integer number (156464).

2^2658404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2658404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2816352).

2658404 is an abundant number, since it is smaller than the sum of its proper divisors (2974300).

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

2658404 is a wasteful number, since it uses less digits than its factorization.

2658404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 291 counting only the distinct ones).

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

The square root of 2658404 is about 1630.4612844223. The cubic root of 2658404 is about 138.5288813598.

The spelling of 2658404 in words is "two million, six hundred fifty-eight thousand, four hundred four".