4003021540 has 48 divisors (see below), whose sum is σ = 9611828352. Its totient is φ = 1371810816.

The previous prime is 4003021531. The next prime is 4003021553. The reversal of 4003021540 is 451203004.

4003021540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 357507 + ... + 368533.

It is an arithmetic number, because the mean of its divisors is an integer number (200246424).

Almost surely, 2^4003021540 is an apocalyptic number.

It is an amenable number.

4003021540 is an abundant number, since it is smaller than the sum of its proper divisors (5608806812).

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

4003021540 is a wasteful number, since it uses less digits than its factorization.

4003021540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13636 (or 13634 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4003021540 is about 63269.4360651334. The cubic root of 4003021540 is about 1587.8006510159.

Adding to 4003021540 its reverse (451203004), we get a palindrome (4454224544).

The spelling of 4003021540 in words is "four billion, three million, twenty-one thousand, five hundred forty".