38810133978 has 128 divisors (see below), whose sum is σ = 101145784320. Its totient is φ = 9632286720.

The previous prime is 38810133959. The next prime is 38810134019. The reversal of 38810133978 is 87933101883.

It is a self number, because there is not a number n which added to its sum of digits gives 38810133978.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1284675 + ... + 1314537.

It is an arithmetic number, because the mean of its divisors is an integer number (790201440).

Almost surely, 2^38810133978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38810133978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50572892160).

38810133978 is an abundant number, since it is smaller than the sum of its proper divisors (62335650342).

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

38810133978 is a wasteful number, since it uses less digits than its factorization.

38810133978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30012.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 38810133978 in words is "thirty-eight billion, eight hundred ten million, one hundred thirty-three thousand, nine hundred seventy-eight".