3728518 has 4 divisors (see below), whose sum is σ = 5592780. Its totient is φ = 1864258.

The previous prime is 3728513. The next prime is 3728533. The reversal of 3728518 is 8158273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8158273 = 281 ⋅29033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3728513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932128 + ... + 932131.

It is an arithmetic number, because the mean of its divisors is an integer number (1398195).

Almost surely, 2^3728518 is an apocalyptic number.

3728518 is a deficient number, since it is larger than the sum of its proper divisors (1864262).

3728518 is a wasteful number, since it uses less digits than its factorization.

3728518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864261.

The product of its digits is 13440, while the sum is 34.

The square root of 3728518 is about 1930.9370782084. The cubic root of 3728518 is about 155.0643922535.

The spelling of 3728518 in words is "three million, seven hundred twenty-eight thousand, five hundred eighteen".