38440217772 has 36 divisors (see below), whose sum is σ = 106001813736. Its totient is φ = 11648550720.

The previous prime is 38440217771. The next prime is 38440217813. The reversal of 38440217772 is 27771204483.

38440217772 is a `hidden beast` number, since 3 + 8 + 4 + 402 + 177 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (38440217771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48535233 + ... + 48536024.

It is an arithmetic number, because the mean of its divisors is an integer number (2944494826).

Almost surely, 2^38440217772 is an apocalyptic number.

It is an amenable number.

38440217772 is an abundant number, since it is smaller than the sum of its proper divisors (67561595964).

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

38440217772 is a wasteful number, since it uses less digits than its factorization.

38440217772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97071278 (or 97071273 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The spelling of 38440217772 in words is "thirty-eight billion, four hundred forty million, two hundred seventeen thousand, seven hundred seventy-two".