38949021747 has 36 divisors (see below), whose sum is σ = 60929535240. Its totient is φ = 24587076312.

The previous prime is 38949021707. The next prime is 38949021751. The reversal of 38949021747 is 74712094983.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

38949021747 is a `hidden beast` number, since 3 + 89 + 490 + 2 + 1 + 74 + 7 = 666.

It is not a de Polignac number, because 38949021747 - 2²³ = 38940633139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38949021693 and 38949021702.

It is not an unprimeable number, because it can be changed into a prime (38949021707) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19483254 + ... + 19485252.

It is an arithmetic number, because the mean of its divisors is an integer number (1692487090).

Almost surely, 2^38949021747 is an apocalyptic number.

38949021747 is a deficient number, since it is larger than the sum of its proper divisors (21980513493).

38949021747 is an frugal number, since it uses more digits than its factorization.

38949021747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 38949021747 in words is "thirty-eight billion, nine hundred forty-nine million, twenty-one thousand, seven hundred forty-seven".