38640999 has 8 divisors (see below), whose sum is σ = 52366192. Its totient is φ = 25338240.

The previous prime is 38640991. The next prime is 38641049. The reversal of 38640999 is 99904683.

It is a happy number.

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

It is not a de Polignac number, because 38640999 - 2³ = 38640991 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 (38640991) 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, 105394 + ... + 105759.

It is an arithmetic number, because the mean of its divisors is an integer number (6545774).

Almost surely, 2^38640999 is an apocalyptic number.

38640999 is a deficient number, since it is larger than the sum of its proper divisors (13725193).

38640999 is a wasteful number, since it uses less digits than its factorization.

38640999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211217.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 38640999 is about 6216.1884623940. The cubic root of 38640999 is about 338.0773809504.

The spelling of 38640999 in words is "thirty-eight million, six hundred forty thousand, nine hundred ninety-nine".