38191959840 has 48 divisors (see below), whose sum is σ = 120304675008. Its totient is φ = 10184522496.

The previous prime is 38191959829. The next prime is 38191959851. The reversal of 38191959840 is 4895919183.

It is an interprime number because it is at equal distance from previous prime (38191959829) and next prime (38191959851).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×38191959840³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39782812 + ... + 39783771.

It is an arithmetic number, because the mean of its divisors is an integer number (2506347396).

Almost surely, 2^38191959840 is an apocalyptic number.

38191959840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38191959840 is an abundant number, since it is smaller than the sum of its proper divisors (82112715168).

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

38191959840 is a wasteful number, since it uses less digits than its factorization.

38191959840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79566601 (or 79566593 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 38191959840 in words is "thirty-eight billion, one hundred ninety-one million, nine hundred fifty-nine thousand, eight hundred forty".