3728635 has 4 divisors (see below), whose sum is σ = 4474368. Its totient is φ = 2982904.

The previous prime is 3728633. The next prime is 3728671. The reversal of 3728635 is 5368273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5368273 = 2111 ⋅2543.

It is a cyclic number.

It is not a de Polignac number, because 3728635 - 2¹ = 3728633 is a prime.

It is a super-3 number, since 3×3728635³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

3728635 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3728635.

It is not an unprimeable number, because it can be changed into a prime (3728633) 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, 372859 + ... + 372868.

It is an arithmetic number, because the mean of its divisors is an integer number (1118592).

Almost surely, 2^3728635 is an apocalyptic number.

3728635 is a deficient number, since it is larger than the sum of its proper divisors (745733).

3728635 is an equidigital number, since it uses as much as digits as its factorization.

3728635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745732.

The product of its digits is 30240, while the sum is 34.

The square root of 3728635 is about 1930.9673741418. The cubic root of 3728635 is about 155.0660141977.

The spelling of 3728635 in words is "three million, seven hundred twenty-eight thousand, six hundred thirty-five".