3649998 has 32 divisors (see below), whose sum is σ = 8242560. Its totient is φ = 1067360.

The previous prime is 3649993. The next prime is 3649999. The reversal of 3649998 is 8999463.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649993) 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, 961 + ... + 2867.

It is an arithmetic number, because the mean of its divisors is an integer number (257580).

Almost surely, 2^3649998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3649998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4121280).

3649998 is an abundant number, since it is smaller than the sum of its proper divisors (4592562).

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

3649998 is a wasteful number, since it uses less digits than its factorization.

3649998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952.

The product of its digits is 419904, while the sum is 48.

The square root of 3649998 is about 1910.4967940303. The cubic root of 3649998 is about 153.9681443077.

The spelling of 3649998 in words is "three million, six hundred forty-nine thousand, nine hundred ninety-eight".