3728726 has 4 divisors (see below), whose sum is σ = 5593092. Its totient is φ = 1864362.

The previous prime is 3728719. The next prime is 3728743. The reversal of 3728726 is 6278273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6278273 = 157 ⋅39989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932180 + ... + 932183.

It is an arithmetic number, because the mean of its divisors is an integer number (1398273).

Almost surely, 2^3728726 is an apocalyptic number.

3728726 is a deficient number, since it is larger than the sum of its proper divisors (1864366).

3728726 is a wasteful number, since it uses less digits than its factorization.

3728726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864365.

The product of its digits is 28224, while the sum is 35.

The square root of 3728726 is about 1930.9909373169. The cubic root of 3728726 is about 155.0672756864.

Adding to 3728726 its sum of digits (35), we get a square (3728761 = 1931²).

The spelling of 3728726 in words is "three million, seven hundred twenty-eight thousand, seven hundred twenty-six".