38402091 has 24 divisors (see below), whose sum is σ = 68271840. Its totient is φ = 20255616.

The previous prime is 38402071. The next prime is 38402093. The reversal of 38402091 is 19020483.

38402091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 38402091 - 2⁶ = 38402027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38402093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22626 + ... + 24263.

It is an arithmetic number, because the mean of its divisors is an integer number (2844660).

Almost surely, 2^38402091 is an apocalyptic number.

38402091 is a deficient number, since it is larger than the sum of its proper divisors (29869749).

38402091 is a wasteful number, since it uses less digits than its factorization.

38402091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46915 (or 46912 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 38402091 is about 6196.9420684722. The cubic root of 38402091 is about 337.3791896821.

The spelling of 38402091 in words is "thirty-eight million, four hundred two thousand, ninety-one".