3651738 has 32 divisors (see below), whose sum is σ = 7810560. Its totient is φ = 1135680.

The previous prime is 3651731. The next prime is 3651757. The reversal of 3651738 is 8371563.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3651699 and 3651708.

It is not an unprimeable number, because it can be changed into a prime (3651731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5056 + ... + 5732.

It is an arithmetic number, because the mean of its divisors is an integer number (244080).

Almost surely, 2^3651738 is an apocalyptic number.

3651738 is an abundant number, since it is smaller than the sum of its proper divisors (4158822).

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

3651738 is a wasteful number, since it uses less digits than its factorization.

3651738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

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

The square root of 3651738 is about 1910.9521187094. The cubic root of 3651738 is about 153.9926066052.

The spelling of 3651738 in words is "three million, six hundred fifty-one thousand, seven hundred thirty-eight".