38240815 has 4 divisors (see below), whose sum is σ = 45888984. Its totient is φ = 30592648.

The previous prime is 38240809. The next prime is 38240849. The reversal of 38240815 is 51804283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51804283 = 1979 ⋅26177.

It is a cyclic number.

It is not a de Polignac number, because 38240815 - 2⁷ = 38240687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3824077 + ... + 3824086.

It is an arithmetic number, because the mean of its divisors is an integer number (11472246).

Almost surely, 2^38240815 is an apocalyptic number.

38240815 is a deficient number, since it is larger than the sum of its proper divisors (7648169).

38240815 is an equidigital number, since it uses as much as digits as its factorization.

38240815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648168.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 38240815 is about 6183.9158306044. The cubic root of 38240815 is about 336.9062335437.

The spelling of 38240815 in words is "thirty-eight million, two hundred forty thousand, eight hundred fifteen".