3646731 has 16 divisors (see below), whose sum is σ = 5397120. Its totient is φ = 2171520.

The previous prime is 3646729. The next prime is 3646739. The reversal of 3646731 is 1376463.

It is not a de Polignac number, because 3646731 - 2¹ = 3646729 is a prime.

It is a super-2 number, since 2×3646731² = 26597293972722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3646739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1011 + ... + 2883.

It is an arithmetic number, because the mean of its divisors is an integer number (337320).

Almost surely, 2^3646731 is an apocalyptic number.

3646731 is a deficient number, since it is larger than the sum of its proper divisors (1750389).

3646731 is a wasteful number, since it uses less digits than its factorization.

3646731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946.

The product of its digits is 9072, while the sum is 30.

The square root of 3646731 is about 1909.6415894089. The cubic root of 3646731 is about 153.9221932250.

The spelling of 3646731 in words is "three million, six hundred forty-six thousand, seven hundred thirty-one".