2158734 has 16 divisors (see below), whose sum is σ = 4505472. Its totient is φ = 688248.

The previous prime is 2158733. The next prime is 2158753. The reversal of 2158734 is 4378512.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 5³ + 8⁷ + 7³ + 3¹⁰ + 4² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158733) 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, 7684 + ... + 7959.

It is an arithmetic number, because the mean of its divisors is an integer number (281592).

2^2158734 is an apocalyptic number.

2158734 is an abundant number, since it is smaller than the sum of its proper divisors (2346738).

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

2158734 is a wasteful number, since it uses less digits than its factorization.

2158734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15671.

The product of its digits is 6720, while the sum is 30.

The square root of 2158734 is about 1469.2630805952. The cubic root of 2158734 is about 129.2408217041.

The spelling of 2158734 in words is "two million, one hundred fifty-eight thousand, seven hundred thirty-four".