38978115 has 16 divisors (see below), whose sum is σ = 68034816. Its totient is φ = 18898400.

The previous prime is 38978113. The next prime is 38978119. The reversal of 38978115 is 51187983.

It is not a de Polignac number, because 38978115 - 2¹ = 38978113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38978113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117951 + ... + 118280.

It is an arithmetic number, because the mean of its divisors is an integer number (4252176).

Almost surely, 2^38978115 is an apocalyptic number.

38978115 is a deficient number, since it is larger than the sum of its proper divisors (29056701).

38978115 is a wasteful number, since it uses less digits than its factorization.

38978115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236250.

The product of its digits is 60480, while the sum is 42.

The square root of 38978115 is about 6243.2455501926. The cubic root of 38978115 is about 339.0576993877.

It can be divided in two parts, 38978 and 115, that added together give a palindrome (39093).

The spelling of 38978115 in words is "thirty-eight million, nine hundred seventy-eight thousand, one hundred fifteen".