3621577428 has 72 divisors (see below), whose sum is σ = 10480887872. Its totient is φ = 1032901632.

The previous prime is 3621577423. The next prime is 3621577481. The reversal of 3621577428 is 8247751263.

3621577428 is a `hidden beast` number, since 3 + 6 + 215 + 7 + 7 + 428 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621577423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132951 + ... + 157857.

Almost surely, 2^3621577428 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 3621577428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5240443936).

3621577428 is an abundant number, since it is smaller than the sum of its proper divisors (6859310444).

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

3621577428 is a wasteful number, since it uses less digits than its factorization.

3621577428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25501 (or 25496 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 3621577428 is about 60179.5432684563. The cubic root of 3621577428 is about 1535.6748019637.

The spelling of 3621577428 in words is "three billion, six hundred twenty-one million, five hundred seventy-seven thousand, four hundred twenty-eight".