3649428 has 24 divisors (see below), whose sum is σ = 9461760. Its totient is φ = 1216440.

The previous prime is 3649417. The next prime is 3649469. The reversal of 3649428 is 8249463.

It is a happy number.

3649428 is a `hidden beast` number, since 3 + 649 + 4 + 2 + 8 = 666.

3649428 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3649392 and 3649401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16788 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (394240).

Almost surely, 2^3649428 is an apocalyptic number.

It is an amenable number.

3649428 is an abundant number, since it is smaller than the sum of its proper divisors (5812332).

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

3649428 is a wasteful number, since it uses less digits than its factorization.

3649428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33804 (or 33796 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 3649428 is about 1910.3476123470. The cubic root of 3649428 is about 153.9601291059.

The spelling of 3649428 in words is "three million, six hundred forty-nine thousand, four hundred twenty-eight".