2164738 has 4 divisors (see below), whose sum is σ = 3247110. Its totient is φ = 1082368.

The previous prime is 2164681. The next prime is 2164739. The reversal of 2164738 is 8374612.

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., 1656369 + 508369 = 1287^2 + 713^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2164739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541183 + ... + 541186.

2^2164738 is an apocalyptic number.

2164738 is a deficient number, since it is larger than the sum of its proper divisors (1082372).

2164738 is a wasteful number, since it uses less digits than its factorization.

2164738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082371.

The product of its digits is 8064, while the sum is 31.

The square root of 2164738 is about 1471.3048630382. The cubic root of 2164738 is about 129.3605282264.

It can be divided in two parts, 2 and 164738, that multiplied together give a square (329476 = 574²).

The spelling of 2164738 in words is "two million, one hundred sixty-four thousand, seven hundred thirty-eight".