32198021478 has 112 divisors (see below), whose sum is σ = 82850309376. Its totient is φ = 9189074160.

The previous prime is 32198021473. The next prime is 32198021501. The reversal of 32198021478 is 87412089123.

It is a happy number.

It is a super-3 number, since 3×32198021478³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32198021473) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 17584023 + ... + 17585853.

Almost surely, 2^32198021478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32198021478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41425154688).

32198021478 is an abundant number, since it is smaller than the sum of its proper divisors (50652287898).

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

32198021478 is a wasteful number, since it uses less digits than its factorization.

32198021478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3581 (or 3566 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 32198021478 in words is "thirty-two billion, one hundred ninety-eight million, twenty-one thousand, four hundred seventy-eight".