3634021040 has 80 divisors (see below), whose sum is σ = 9235013088. Its totient is φ = 1321740288.

The previous prime is 3634021009. The next prime is 3634021057. The reversal of 3634021040 is 401204363.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×3634021040² = 26412217838325363200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3634020997 and 3634021015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43604 + ... + 95756.

Almost surely, 2^3634021040 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 3634021040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4617506544).

3634021040 is an abundant number, since it is smaller than the sum of its proper divisors (5600992048).

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

3634021040 is a wasteful number, since it uses less digits than its factorization.

3634021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52246 (or 52240 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 3634021040 is about 60282.8420033429. The cubic root of 3634021040 is about 1537.4316328029.

The spelling of 3634021040 in words is "three billion, six hundred thirty-four million, twenty-one thousand, forty".