38061891 has 48 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 20664000.

The previous prime is 38061871. The next prime is 38061911. The reversal of 38061891 is 19816083.

38061891 is a `hidden beast` number, since 38 + 0 + 618 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (38061871) and next prime (38061911).

It is not a de Polignac number, because 38061891 - 2⁷ = 38061763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38061811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151516 + ... + 151766.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^38061891 is an apocalyptic number.

38061891 is a deficient number, since it is larger than the sum of its proper divisors (27982269).

38061891 is a wasteful number, since it uses less digits than its factorization.

38061891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 38061891 is about 6169.4319835784. The cubic root of 38061891 is about 336.3799645017.

The spelling of 38061891 in words is "thirty-eight million, sixty-one thousand, eight hundred ninety-one".