38404216736634 has 128 divisors (see below), whose sum is σ = 96087837081600. Its totient is φ = 9984124523520.

The previous prime is 38404216736623. The next prime is 38404216736681. The reversal of 38404216736634 is 43663761240483.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 75874 + ... + 8764370.

It is an arithmetic number, because the mean of its divisors is an integer number (750686227200).

Almost surely, 2^{38404216736634} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38404216736634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48043918540800).

38404216736634 is an abundant number, since it is smaller than the sum of its proper divisors (57683620344966).

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

38404216736634 is a wasteful number, since it uses less digits than its factorization.

38404216736634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8688748.

The product of its (nonzero) digits is 41803776, while the sum is 57.

The spelling of 38404216736634 in words is "thirty-eight trillion, four hundred four billion, two hundred sixteen million, seven hundred thirty-six thousand, six hundred thirty-four".