2138090 has 16 divisors (see below), whose sum is σ = 4075272. Its totient is φ = 804864.

The previous prime is 2138033. The next prime is 2138093. The reversal of 2138090 is 908312.

2138090 = T₂₁₆ + T₂₁₇ + ... + T₂₈₃.

It can be written as a sum of positive squares in 4 ways, for example, as 2128681 + 9409 = 1459^2 + 97^2 .

It is not an unprimeable number, because it can be changed into a prime (2138093) 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, 6119 + ... + 6458.

2^2138090 is an apocalyptic number.

2138090 is a deficient number, since it is larger than the sum of its proper divisors (1937182).

2138090 is a wasteful number, since it uses less digits than its factorization.

2138090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12601.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2138090 is about 1462.2209135421. The cubic root of 2138090 is about 128.8275242413.

The spelling of 2138090 in words is "two million, one hundred thirty-eight thousand, ninety".