2623404 has 24 divisors (see below), whose sum is σ = 6995968. Its totient is φ = 749520.

The previous prime is 2623391. The next prime is 2623409. The reversal of 2623404 is 4043262.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2623409) 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, 15532 + ... + 15699.

2^2623404 is an apocalyptic number.

It is an amenable number.

2623404 is an abundant number, since it is smaller than the sum of its proper divisors (4372564).

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

2623404 is a wasteful number, since it uses less digits than its factorization.

2623404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31245 (or 31243 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 2623404 is about 1619.6925634206. The cubic root of 2623404 is about 137.9182460528.

Adding to 2623404 its reverse (4043262), we get a palindrome (6666666).

The spelling of 2623404 in words is "two million, six hundred twenty-three thousand, four hundred four".