39871184428648 has 8 divisors (see below), whose sum is σ = 74758470803730. Its totient is φ = 19935592214320.

The previous prime is 39871184428643. The next prime is 39871184428667. The reversal of 39871184428648 is 84682448117893.

It can be written as a sum of positive squares in only one way, i.e., 38901191874724 + 969992553924 = 6237082^2 + 984882^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×39871184428648² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (73) 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 (39871184428643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2491949026783 + ... + 2491949026798.

Almost surely, 2^{39871184428648} is an apocalyptic number.

It is an amenable number.

39871184428648 is a deficient number, since it is larger than the sum of its proper divisors (34887286375082).

39871184428648 is a wasteful number, since it uses less digits than its factorization.

39871184428648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983898053587 (or 4983898053583 counting only the distinct ones).

The product of its digits is 594542592, while the sum is 73.

The spelling of 39871184428648 in words is "thirty-nine trillion, eight hundred seventy-one billion, one hundred eighty-four million, four hundred twenty-eight thousand, six hundred forty-eight".