1022201988 has 12 divisors (see below), whose sum is σ = 2385138000. Its totient is φ = 340733992.

The previous prime is 1022201951. The next prime is 1022202001. The reversal of 1022201988 is 8891022201.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42591738 + ... + 42591761.

It is an arithmetic number, because the mean of its divisors is an integer number (198761500).

Almost surely, 2^1022201988 is an apocalyptic number.

It is an amenable number.

1022201988 is an abundant number, since it is smaller than the sum of its proper divisors (1362936012).

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

1022201988 is a wasteful number, since it uses less digits than its factorization.

1022201988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85183506 (or 85183504 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1022201988 is about 31971.8937193279. The cubic root of 1022201988 is about 1007.3465585745.

The spelling of 1022201988 in words is "one billion, twenty-two million, two hundred one thousand, nine hundred eighty-eight".