3728923 has 4 divisors (see below), whose sum is σ = 4067928. Its totient is φ = 3389920.

The previous prime is 3728911. The next prime is 3728939. The reversal of 3728923 is 3298273.

3728923 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3298273 = 11 ⋅299843.

It is a cyclic number.

It is not a de Polignac number, because 3728923 - 2⁵ = 3728891 is a prime.

It is a Duffinian number.

3728923 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3728983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169486 + ... + 169507.

It is an arithmetic number, because the mean of its divisors is an integer number (1016982).

Almost surely, 2^3728923 is an apocalyptic number.

3728923 is a deficient number, since it is larger than the sum of its proper divisors (339005).

3728923 is a wasteful number, since it uses less digits than its factorization.

3728923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339004.

The product of its digits is 18144, while the sum is 34.

The square root of 3728923 is about 1931.0419467220. The cubic root of 3728923 is about 155.0700065311.

The spelling of 3728923 in words is "three million, seven hundred twenty-eight thousand, nine hundred twenty-three".