4002023820 has 48 divisors (see below), whose sum is σ = 11304851040. Its totient is φ = 1057760256.

The previous prime is 4002023807. The next prime is 4002023863. The reversal of 4002023820 is 283202004.

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, 288355 + ... + 301914.

It is an arithmetic number, because the mean of its divisors is an integer number (235517730).

Almost surely, 2^4002023820 is an apocalyptic number.

It is an amenable number.

4002023820 is an abundant number, since it is smaller than the sum of its proper divisors (7302827220).

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

4002023820 is a wasteful number, since it uses less digits than its factorization.

4002023820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590394 (or 590392 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4002023820 is about 63261.5508820326. The cubic root of 4002023820 is about 1587.6687246629.

Adding to 4002023820 its reverse (283202004), we get a palindrome (4285225824).

The spelling of 4002023820 in words is "four billion, two million, twenty-three thousand, eight hundred twenty".