38681308890 has 64 divisors (see below), whose sum is σ = 117885899520. Its totient is φ = 8841441600.

The previous prime is 38681308871. The next prime is 38681308949. The reversal of 38681308890 is 9880318683.

It is a happy number.

38681308890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10231261 + ... + 10235040.

It is an arithmetic number, because the mean of its divisors is an integer number (1841967180).

Almost surely, 2^38681308890 is an apocalyptic number.

38681308890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38681308890 is an abundant number, since it is smaller than the sum of its proper divisors (79204590630).

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

38681308890 is a wasteful number, since it uses less digits than its factorization.

38681308890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20466324 (or 20466318 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 38681308890 in words is "thirty-eight billion, six hundred eighty-one million, three hundred eight thousand, eight hundred ninety".