2138290 has 32 divisors (see below), whose sum is σ = 4800384. Its totient is φ = 666240.

The previous prime is 2138263. The next prime is 2138291. The reversal of 2138290 is 928312.

It is not an unprimeable number, because it can be changed into a prime (2138291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619 + ... + 2158.

It is an arithmetic number, because the mean of its divisors is an integer number (150012).

2^2138290 is an apocalyptic number.

2138290 is an abundant number, since it is smaller than the sum of its proper divisors (2662094).

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

2138290 is a wasteful number, since it uses less digits than its factorization.

2138290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2138290 is about 1462.2893010619. The cubic root of 2138290 is about 128.8315410197.

The spelling of 2138290 in words is "two million, one hundred thirty-eight thousand, two hundred ninety".