38400120634215 has 32 divisors (see below), whose sum is σ = 63562438817280. Its totient is φ = 19772729481344.

The previous prime is 38400120634181. The next prime is 38400120634259. The reversal of 38400120634215 is 51243602100483.

It is a cyclic number.

It is not a de Polignac number, because 38400120634215 - 2⁶ = 38400120634151 is a prime.

It is a super-2 number, since 2×38400120634215² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5163742 + ... + 10171748.

It is an arithmetic number, because the mean of its divisors is an integer number (1986326213040).

Almost surely, 2^{38400120634215} is an apocalyptic number.

38400120634215 is a deficient number, since it is larger than the sum of its proper divisors (25162318183065).

38400120634215 is a wasteful number, since it uses less digits than its factorization.

38400120634215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025671.

The product of its (nonzero) digits is 138240, while the sum is 39.

Adding to 38400120634215 its reverse (51243602100483), we get a palindrome (89643722734698).

The spelling of 38400120634215 in words is "thirty-eight trillion, four hundred billion, one hundred twenty million, six hundred thirty-four thousand, two hundred fifteen".