38400081 has 8 divisors (see below), whose sum is σ = 52289664. Its totient is φ = 25055280.

The previous prime is 38400077. The next prime is 38400107. The reversal of 38400081 is 18000483.

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

It is not a de Polignac number, because 38400081 - 2² = 38400077 is a prime.

It is a super-2 number, since 2×38400081² = 2949132441613122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38400071) 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 7 ways as a sum of consecutive naturals, for example, 136030 + ... + 136311.

It is an arithmetic number, because the mean of its divisors is an integer number (6536208).

Almost surely, 2^38400081 is an apocalyptic number.

It is an amenable number.

38400081 is a deficient number, since it is larger than the sum of its proper divisors (13889583).

38400081 is a wasteful number, since it uses less digits than its factorization.

38400081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272391.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 38400081 is about 6196.7798895878. The cubic root of 38400081 is about 337.3733033360.

The spelling of 38400081 in words is "thirty-eight million, four hundred thousand, eighty-one".