4020215394 has 32 divisors (see below), whose sum is σ = 8870125824. Its totient is φ = 1206817920.

The previous prime is 4020215389. The next prime is 4020215411. The reversal of 4020215394 is 4935120204.

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, 625354 + ... + 631749.

It is an arithmetic number, because the mean of its divisors is an integer number (277191432).

Almost surely, 2^4020215394 is an apocalyptic number.

4020215394 is an abundant number, since it is smaller than the sum of its proper divisors (4849910430).

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

4020215394 is a wasteful number, since it uses less digits than its factorization.

4020215394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257162.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 4020215394 is about 63405.1685117231. The cubic root of 4020215394 is about 1590.0707211137.

Adding to 4020215394 its reverse (4935120204), we get a palindrome (8955335598).

The spelling of 4020215394 in words is "four billion, twenty million, two hundred fifteen thousand, three hundred ninety-four".