38846978 has 4 divisors (see below), whose sum is σ = 58270470. Its totient is φ = 19423488.

The previous prime is 38846971. The next prime is 38846993. The reversal of 38846978 is 87964883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87964883 = 269 ⋅327007.

It can be written as a sum of positive squares in only one way, i.e., 34656769 + 4190209 = 5887^2 + 2047^2 .

It is not an unprimeable number, because it can be changed into a prime (38846971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9711743 + ... + 9711746.

Almost surely, 2^38846978 is an apocalyptic number.

38846978 is a deficient number, since it is larger than the sum of its proper divisors (19423492).

38846978 is a wasteful number, since it uses less digits than its factorization.

38846978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19423491.

The product of its digits is 2322432, while the sum is 53.

The square root of 38846978 is about 6232.7343919022. The cubic root of 38846978 is about 338.6770330715.

The spelling of 38846978 in words is "thirty-eight million, eight hundred forty-six thousand, nine hundred seventy-eight".