38778320 has 40 divisors (see below), whose sum is σ = 103041024. Its totient is φ = 13295232.

The previous prime is 38778319. The next prime is 38778353. The reversal of 38778320 is 2387783.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 34064 + ... + 35183.

Almost surely, 2^38778320 is an apocalyptic number.

It is an amenable number.

38778320 is an abundant number, since it is smaller than the sum of its proper divisors (64262704).

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

38778320 is a wasteful number, since it uses less digits than its factorization.

38778320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69267 (or 69261 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 38778320 is about 6227.2241006728. The cubic root of 38778320 is about 338.4773899124.

The spelling of 38778320 in words is "thirty-eight million, seven hundred seventy-eight thousand, three hundred twenty".