38190891 has 16 divisors (see below), whose sum is σ = 54604800. Its totient is φ = 23657088.

The previous prime is 38190881. The next prime is 38190907. The reversal of 38190891 is 19809183.

It is a happy number.

It is not a de Polignac number, because 38190891 - 2¹³ = 38182699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38190811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711 + ... + 8768.

It is an arithmetic number, because the mean of its divisors is an integer number (3412800).

Almost surely, 2^38190891 is an apocalyptic number.

38190891 is a deficient number, since it is larger than the sum of its proper divisors (16413909).

38190891 is a wasteful number, since it uses less digits than its factorization.

38190891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 38190891 is about 6179.8779114154. The cubic root of 38190891 is about 336.7595575241.

The spelling of 38190891 in words is "thirty-eight million, one hundred ninety thousand, eight hundred ninety-one".