2123438 has 16 divisors (see below), whose sum is σ = 3404160. Its totient is φ = 991200.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123438 is 8343212.

It is a super-3 number, since 3×2123438³ = 28723675369333391016, which contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1208 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (212760).

2^2123438 is an apocalyptic number.

2123438 is a deficient number, since it is larger than the sum of its proper divisors (1280722).

2123438 is a wasteful number, since it uses less digits than its factorization.

2123438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243.

The product of its digits is 1152, while the sum is 23.

The square root of 2123438 is about 1457.2021136411. The cubic root of 2123438 is about 128.5325710911.

The spelling of 2123438 in words is "two million, one hundred twenty-three thousand, four hundred thirty-eight".