38499991 has 8 divisors (see below), whose sum is σ = 39047184. Its totient is φ = 37956480.

The previous prime is 38499973. The next prime is 38500001. The reversal of 38499991 is 19999483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38499991 - 2⁵ = 38499959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38499911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25041 + ... + 26533.

It is an arithmetic number, because the mean of its divisors is an integer number (4880898).

Almost surely, 2^38499991 is an apocalyptic number.

38499991 is a deficient number, since it is larger than the sum of its proper divisors (547193).

38499991 is a wasteful number, since it uses less digits than its factorization.

38499991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its digits is 629856, while the sum is 52.

The square root of 38499991 is about 6204.8360977547. The cubic root of 38499991 is about 337.6656445231.

The spelling of 38499991 in words is "thirty-eight million, four hundred ninety-nine thousand, nine hundred ninety-one".