38378728 has 16 divisors (see below), whose sum is σ = 72946980. Its totient is φ = 18926208.

The previous prime is 38378719. The next prime is 38378737. The reversal of 38378728 is 82787383.

It is an interprime number because it is at equal distance from previous prime (38378719) and next prime (38378737).

It can be written as a sum of positive squares in 2 ways, for example, as 38217124 + 161604 = 6182^2 + 402^2 .

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, 32275 + ... + 33442.

Almost surely, 2^38378728 is an apocalyptic number.

It is an amenable number.

38378728 is a deficient number, since it is larger than the sum of its proper divisors (34568252).

38378728 is a wasteful number, since it uses less digits than its factorization.

38378728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65796 (or 65792 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 38378728 is about 6195.0567390461. The cubic root of 38378728 is about 337.3107577401.

The spelling of 38378728 in words is "thirty-eight million, three hundred seventy-eight thousand, seven hundred twenty-eight".