2153738 has 4 divisors (see below), whose sum is σ = 3230610. Its totient is φ = 1076868.

The previous prime is 2153737. The next prime is 2153773. The reversal of 2153738 is 8373512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1408969 + 744769 = 1187^2 + 863^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2153738.

It is not an unprimeable number, because it can be changed into a prime (2153737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538433 + ... + 538436.

2^2153738 is an apocalyptic number.

2153738 is a deficient number, since it is larger than the sum of its proper divisors (1076872).

2153738 is a wasteful number, since it uses less digits than its factorization.

2153738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076871.

The product of its digits is 5040, while the sum is 29.

The square root of 2153738 is about 1467.5619237361. The cubic root of 2153738 is about 129.1410431772.

The spelling of 2153738 in words is "two million, one hundred fifty-three thousand, seven hundred thirty-eight".