38098721 has 8 divisors (see below), whose sum is σ = 40684800. Its totient is φ = 35597520.

The previous prime is 38098703. The next prime is 38098727. The reversal of 38098721 is 12789083.

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 38098721 - 2⁶ = 38098657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38098727) 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, 20291 + ... + 22088.

It is an arithmetic number, because the mean of its divisors is an integer number (5085600).

Almost surely, 2^38098721 is an apocalyptic number.

38098721 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

38098721 is a deficient number, since it is larger than the sum of its proper divisors (2586079).

38098721 is a wasteful number, since it uses less digits than its factorization.

38098721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42439.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 38098721 is about 6172.4161395680. The cubic root of 38098721 is about 336.4884271480.

The spelling of 38098721 in words is "thirty-eight million, ninety-eight thousand, seven hundred twenty-one".