38989978 has 16 divisors (see below), whose sum is σ = 61793280. Its totient is φ = 18420976.

The previous prime is 38989967. The next prime is 38989981. The reversal of 38989978 is 87998983.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4426 + ... + 9877.

It is an arithmetic number, because the mean of its divisors is an integer number (3862080).

Almost surely, 2^38989978 is an apocalyptic number.

38989978 is a deficient number, since it is larger than the sum of its proper divisors (22803302).

38989978 is a wasteful number, since it uses less digits than its factorization.

38989978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14381.

The product of its digits is 7838208, while the sum is 61.

The square root of 38989978 is about 6244.1955446639. The cubic root of 38989978 is about 339.0920933333.

The spelling of 38989978 in words is "thirty-eight million, nine hundred eighty-nine thousand, nine hundred seventy-eight".