4021345340 has 24 divisors (see below), whose sum is σ = 8481711840. Its totient is φ = 1601512128.

The previous prime is 4021345331. The next prime is 4021345387. The reversal of 4021345340 is 435431204.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 434432 + ... + 443591.

It is an arithmetic number, because the mean of its divisors is an integer number (353404660).

Almost surely, 2^4021345340 is an apocalyptic number.

It is an amenable number.

4021345340 is an abundant number, since it is smaller than the sum of its proper divisors (4460366500).

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

4021345340 is a wasteful number, since it uses less digits than its factorization.

4021345340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878261 (or 878259 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 4021345340 is about 63414.0784053510. The cubic root of 4021345340 is about 1590.2196787832.

Adding to 4021345340 its reverse (435431204), we get a palindrome (4456776544).

The spelling of 4021345340 in words is "four billion, twenty-one million, three hundred forty-five thousand, three hundred forty".