2138430 has 64 divisors (see below), whose sum is σ = 6220800. Its totient is φ = 459264.

The previous prime is 2138429. The next prime is 2138467. The reversal of 2138430 is 348312.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2138397 and 2138406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3271 + ... + 3869.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^2138430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110400).

2138430 is an abundant number, since it is smaller than the sum of its proper divisors (4082370).

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

2138430 is a wasteful number, since it uses less digits than its factorization.

2138430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2138430 is about 1462.3371704227. The cubic root of 2138430 is about 128.8343526156.

The spelling of 2138430 in words is "two million, one hundred thirty-eight thousand, four hundred thirty".