28150142457978 has 112 divisors (see below), whose sum is σ = 63960352246440. Its totient is φ = 9287226160128.

The previous prime is 28150142457953. The next prime is 28150142458001. The reversal of 28150142457978 is 87975424105182.

28150142457978 is a `hidden beast` number, since 2 + 8 + 1 + 50 + 1 + 4 + 2 + 4 + 579 + 7 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13574751778449 + 14575390679529 = 3684393^2 + 3817773^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 67105308 + ... + 67523496.

Almost surely, 2^{28150142457978} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28150142457978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31980176123220).

28150142457978 is an abundant number, since it is smaller than the sum of its proper divisors (35810209788462).

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

28150142457978 is a wasteful number, since it uses less digits than its factorization.

28150142457978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418683 (or 418668 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 63.

The spelling of 28150142457978 in words is "twenty-eight trillion, one hundred fifty billion, one hundred forty-two million, four hundred fifty-seven thousand, nine hundred seventy-eight".