38599981 has 8 divisors (see below), whose sum is σ = 44169984. Its totient is φ = 33043920.

The previous prime is 38599961. The next prime is 38600021. The reversal of 38599981 is 18999583.

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

It is not a de Polignac number, because 38599981 - 2⁵ = 38599949 is a prime.

It is a super-2 number, since 2×38599981² = 2979917066400722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38599921) 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, 3351 + ... + 9403.

It is an arithmetic number, because the mean of its divisors is an integer number (5521248).

Almost surely, 2^38599981 is an apocalyptic number.

It is an amenable number.

38599981 is a deficient number, since it is larger than the sum of its proper divisors (5570003).

38599981 is an equidigital number, since it uses as much as digits as its factorization.

38599981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971.

The product of its digits is 699840, while the sum is 52.

The square root of 38599981 is about 6212.8882977243. Note that the first 3 decimals coincide. The cubic root of 38599981 is about 337.9577138608.

The spelling of 38599981 in words is "thirty-eight million, five hundred ninety-nine thousand, nine hundred eighty-one".