1620442226 has 16 divisors (see below), whose sum is σ = 2618469504. Its totient is φ = 747658704.

The previous prime is 1620442181. The next prime is 1620442277. The reversal of 1620442226 is 6222440261.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94055 + ... + 109941.

It is an arithmetic number, because the mean of its divisors is an integer number (163654344).

Almost surely, 2^1620442226 is an apocalyptic number.

1620442226 is a deficient number, since it is larger than the sum of its proper divisors (998027278).

1620442226 is a wasteful number, since it uses less digits than its factorization.

1620442226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19825.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1620442226 is about 40254.7168167906. The cubic root of 1620442226 is about 1174.5671502981.

Adding to 1620442226 its reverse (6222440261), we get a palindrome (7842882487).

The spelling of 1620442226 in words is "one billion, six hundred twenty million, four hundred forty-two thousand, two hundred twenty-six".