90338851922 has 30 divisors (see below), whose sum is σ = 150026442279. Its totient is φ = 40767696420.

The previous prime is 90338851913. The next prime is 90338851927. The reversal of 90338851922 is 22915883309.

It can be written as a sum of positive squares in only one way, i.e., 45169425961 + 45169425961 = 212531^2 + 212531^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=212531.

It is a super-2 number, since 2×90338851922² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90338851927) 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 14 ways as a sum of consecutive naturals, for example, 649919729 + ... + 649919867.

Almost surely, 2^90338851922 is an apocalyptic number.

90338851922 is a deficient number, since it is larger than the sum of its proper divisors (59687590357).

90338851922 is an frugal number, since it uses more digits than its factorization.

90338851922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

Multiplying 90338851922 by its sum of digits (50), we get a square (4516942596100 = 2125310²).

The spelling of 90338851922 in words is "ninety billion, three hundred thirty-eight million, eight hundred fifty-one thousand, nine hundred twenty-two".