3620428 has 48 divisors (see below), whose sum is σ = 7727104. Its totient is φ = 1451520.

The previous prime is 3620401. The next prime is 3620437. The reversal of 3620428 is 8240263.

It is a happy 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, 37276 + ... + 37372.

Almost surely, 2^3620428 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 3620428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3863552).

3620428 is an abundant number, since it is smaller than the sum of its proper divisors (4106676).

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

3620428 is a wasteful number, since it uses less digits than its factorization.

3620428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 3620428 is about 1902.7422316226. The cubic root of 3620428 is about 153.5512318955.

The spelling of 3620428 in words is "three million, six hundred twenty thousand, four hundred twenty-eight".