4019390820 has 36 divisors (see below), whose sum is σ = 12192152700. Its totient is φ = 1071837504.

The previous prime is 4019390789. The next prime is 4019390827. The reversal of 4019390820 is 280939104.

4019390820 is a `hidden beast` number, since 401 + 93 + 90 + 82 + 0 = 666.

4019390820 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1988446464 + 2030944356 = 44592^2 + 45066^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (4019390827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11164795 + ... + 11165154.

Almost surely, 2^4019390820 is an apocalyptic number.

It is an amenable number.

4019390820 is an abundant number, since it is smaller than the sum of its proper divisors (8172761880).

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

4019390820 is a wasteful number, since it uses less digits than its factorization.

4019390820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22329964 (or 22329959 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 4019390820 is about 63398.6657588312. The cubic root of 4019390820 is about 1589.9620021773.

The spelling of 4019390820 in words is "four billion, nineteen million, three hundred ninety thousand, eight hundred twenty".