4030020391 has 8 divisors (see below), whose sum is σ = 4270134240. Its totient is φ = 3790245888.

The previous prime is 4030020377. The next prime is 4030020437. The reversal of 4030020391 is 1930200304.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4030020391 - 2¹⁹ = 4029496103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4030020301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60171 + ... + 108076.

It is an arithmetic number, because the mean of its divisors is an integer number (533766780).

Almost surely, 2^4030020391 is an apocalyptic number.

4030020391 is a deficient number, since it is larger than the sum of its proper divisors (240113849).

4030020391 is a wasteful number, since it uses less digits than its factorization.

4030020391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169673.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 4030020391 is about 63482.4415960823. The cubic root of 4030020391 is about 1591.3623584580.

Adding to 4030020391 its reverse (1930200304), we get a palindrome (5960220695).

The spelling of 4030020391 in words is "four billion, thirty million, twenty thousand, three hundred ninety-one".