1998754422 has 32 divisors (see below), whose sum is σ = 4575336192. Its totient is φ = 570228384.

The previous prime is 1998754421. The next prime is 1998754451. The reversal of 1998754422 is 2244578991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1998754421) 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, 6153 + ... + 63524.

It is an arithmetic number, because the mean of its divisors is an integer number (142979256).

Almost surely, 2^1998754422 is an apocalyptic number.

1998754422 is an abundant number, since it is smaller than the sum of its proper divisors (2576581770).

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

1998754422 is a wasteful number, since it uses less digits than its factorization.

1998754422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70372.

The product of its digits is 1451520, while the sum is 51.

The square root of 1998754422 is about 44707.4313956863. The cubic root of 1998754422 is about 1259.6594405880.

The spelling of 1998754422 in words is "one billion, nine hundred ninety-eight million, seven hundred fifty-four thousand, four hundred twenty-two".