1198021902 has 32 divisors (see below), whose sum is σ = 2987276544. Its totient is φ = 311174400.

The previous prime is 1198021901. The next prime is 1198021921. The reversal of 1198021902 is 2091208911.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198021901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1296099 + ... + 1297022.

It is an arithmetic number, because the mean of its divisors is an integer number (93352392).

Almost surely, 2^1198021902 is an apocalyptic number.

1198021902 is an abundant number, since it is smaller than the sum of its proper divisors (1789254642).

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

1198021902 is a wasteful number, since it uses less digits than its factorization.

1198021902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593144.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 1198021902 is about 34612.4529902173. The cubic root of 1198021902 is about 1062.0743472764.

The spelling of 1198021902 in words is "one billion, one hundred ninety-eight million, twenty-one thousand, nine hundred two".