1220091398 has 8 divisors (see below), whose sum is σ = 1830330840. Its totient is φ = 609981120.

The previous prime is 1220091371. The next prime is 1220091401. The reversal of 1220091398 is 8931900221.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563 + ... + 49526.

It is an arithmetic number, because the mean of its divisors is an integer number (228791355).

Almost surely, 2^1220091398 is an apocalyptic number.

1220091398 is a deficient number, since it is larger than the sum of its proper divisors (610239442).

1220091398 is a wasteful number, since it uses less digits than its factorization.

1220091398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64582.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1220091398 is about 34929.8067272065. The cubic root of 1220091398 is about 1068.5564129471.

The spelling of 1220091398 in words is "one billion, two hundred twenty million, ninety-one thousand, three hundred ninety-eight".