4028393840 has 20 divisors (see below), whose sum is σ = 9366015864. Its totient is φ = 1611357504.

The previous prime is 4028393819. The next prime is 4028393849. The reversal of 4028393840 is 483938204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028393849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25177382 + ... + 25177541.

Almost surely, 2^4028393840 is an apocalyptic number.

4028393840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4028393840 is an abundant number, since it is smaller than the sum of its proper divisors (5337622024).

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

4028393840 is a wasteful number, since it uses less digits than its factorization.

4028393840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50354936 (or 50354930 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 4028393840 is about 63469.6292725899. The cubic root of 4028393840 is about 1591.1482337887.

The spelling of 4028393840 in words is "four billion, twenty-eight million, three hundred ninety-three thousand, eight hundred forty".