3728718 has 48 divisors (see below), whose sum is σ = 9356256. Its totient is φ = 1051200.

The previous prime is 3728717. The next prime is 3728719. The reversal of 3728718 is 8178273.

It is an interprime number because it is at equal distance from previous prime (3728717) and next prime (3728719).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3728713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12580 + ... + 12872.

It is an arithmetic number, because the mean of its divisors is an integer number (194922).

Almost surely, 2^3728718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3728718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4678128).

3728718 is an abundant number, since it is smaller than the sum of its proper divisors (5627538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3728718 is a wasteful number, since it uses less digits than its factorization.

3728718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 406 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 3728718 is about 1930.9888658405. The cubic root of 3728718 is about 155.0671647871.

The spelling of 3728718 in words is "three million, seven hundred twenty-eight thousand, seven hundred eighteen".