2138790 has 16 divisors (see below), whose sum is σ = 5133168. Its totient is φ = 570336.

The previous prime is 2138789. The next prime is 2138797. The reversal of 2138790 is 978312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 71293 = 2138790 / (2 + 1 + 3 + 8 + 7 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138797) 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, 35617 + ... + 35676.

It is an arithmetic number, because the mean of its divisors is an integer number (320823).

2^2138790 is an apocalyptic number.

2138790 is an abundant number, since it is smaller than the sum of its proper divisors (2994378).

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

2138790 is a wasteful number, since it uses less digits than its factorization.

2138790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71303.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2138790 is about 1462.4602558702. The cubic root of 2138790 is about 128.8415818702.

The spelling of 2138790 in words is "two million, one hundred thirty-eight thousand, seven hundred ninety".