3685731 has 12 divisors (see below), whose sum is σ = 5716872. Its totient is φ = 2106048.

The previous prime is 3685729. The next prime is 3685739. The reversal of 3685731 is 1375863.

It is a happy number.

It is not a de Polignac number, because 3685731 - 2¹ = 3685729 is a prime.

It is a super-2 number, since 2×3685731² = 27169226008722, which contains 22 as substring.

3685731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3685692 and 3685701.

It is not an unprimeable number, because it can be changed into a prime (3685739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12390 + ... + 12683.

It is an arithmetic number, because the mean of its divisors is an integer number (476406).

Almost surely, 2^3685731 is an apocalyptic number.

3685731 is a deficient number, since it is larger than the sum of its proper divisors (2031141).

3685731 is a wasteful number, since it uses less digits than its factorization.

3685731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25090 (or 25083 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 3685731 is about 1919.8257733451. The cubic root of 3685731 is about 154.4689561741.

The spelling of 3685731 in words is "three million, six hundred eighty-five thousand, seven hundred thirty-one".