28194373620 has 576 divisors, whose sum is σ = 106526784000. Its totient is φ = 6187829760.

The previous prime is 28194373607. The next prime is 28194373631. The reversal of 28194373620 is 2637349182.

28194373620 is a `hidden beast` number, since 2 + 8 + 19 + 4 + 3 + 7 + 3 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 155769930 + ... + 155770110.

Almost surely, 2^28194373620 is an apocalyptic number.

28194373620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28194373620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53263392000).

28194373620 is an abundant number, since it is smaller than the sum of its proper divisors (78332410380).

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

28194373620 is a wasteful number, since it uses less digits than its factorization.

28194373620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 28194373620 in words is "twenty-eight billion, one hundred ninety-four million, three hundred seventy-three thousand, six hundred twenty".