3649976 has 64 divisors (see below), whose sum is σ = 8208000. Its totient is φ = 1503360.

The previous prime is 3649967. The next prime is 3649981. The reversal of 3649976 is 6799463.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

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, 61835 + ... + 61893.

It is an arithmetic number, because the mean of its divisors is an integer number (128250).

Almost surely, 2^3649976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3649976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4104000).

3649976 is an abundant number, since it is smaller than the sum of its proper divisors (4558024).

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

3649976 is a wasteful number, since it uses less digits than its factorization.

3649976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 128 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 3649976 is about 1910.4910363569. The cubic root of 3649976 is about 153.9678349645.

The spelling of 3649976 in words is "three million, six hundred forty-nine thousand, nine hundred seventy-six".