3728138 has 4 divisors (see below), whose sum is σ = 5592210. Its totient is φ = 1864068.

The previous prime is 3728113. The next prime is 3728141. The reversal of 3728138 is 8318273.

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., 2122849 + 1605289 = 1457^2 + 1267^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932033 + ... + 932036.

Almost surely, 2^3728138 is an apocalyptic number.

3728138 is a deficient number, since it is larger than the sum of its proper divisors (1864072).

3728138 is a wasteful number, since it uses less digits than its factorization.

3728138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864071.

The product of its digits is 8064, while the sum is 32.

The square root of 3728138 is about 1930.8386778807. The cubic root of 3728138 is about 155.0591241666.

The spelling of 3728138 in words is "three million, seven hundred twenty-eight thousand, one hundred thirty-eight".