38978816 has 36 divisors (see below), whose sum is σ = 78587712. Its totient is φ = 19293696.

The previous prime is 38978809. The next prime is 38978827. The reversal of 38978816 is 61887983.

It is a happy 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, 26681 + ... + 28103.

It is an arithmetic number, because the mean of its divisors is an integer number (2182992).

Almost surely, 2^38978816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38978816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39293856).

38978816 is an abundant number, since it is smaller than the sum of its proper divisors (39608896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38978816 is a wasteful number, since it uses less digits than its factorization.

38978816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 1532 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 38978816 is about 6243.3016906121. The cubic root of 38978816 is about 339.0597319643.

The spelling of 38978816 in words is "thirty-eight million, nine hundred seventy-eight thousand, eight hundred sixteen".