2193408 has 144 divisors (see below), whose sum is σ = 7665840. Its totient is φ = 589824.

The previous prime is 2193383. The next prime is 2193413. The reversal of 2193408 is 8043912.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×2193408² = 9622077308928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129016 + ... + 129032.

It is an arithmetic number, because the mean of its divisors is an integer number (53235).

2^2193408 is an apocalyptic number.

2193408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2193408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3832920).

2193408 is an abundant number, since it is smaller than the sum of its proper divisors (5472432).

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

2193408 is a wasteful number, since it uses less digits than its factorization.

2193408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2193408 is about 1481.0158675720. The cubic root of 2193408 is about 129.9291132275.

It can be divided in two parts, 2193 and 408, that added together give a square (2601 = 51²).

The spelling of 2193408 in words is "two million, one hundred ninety-three thousand, four hundred eight".