38778156 has 48 divisors (see below), whose sum is σ = 106454880. Its totient is φ = 12165120.

The previous prime is 38778151. The next prime is 38778197. The reversal of 38778156 is 65187783.

It is not an unprimeable number, because it can be changed into a prime (38778151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8725 + ... + 12396.

It is an arithmetic number, because the mean of its divisors is an integer number (2217810).

Almost surely, 2^38778156 is an apocalyptic number.

38778156 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

38778156 is an abundant number, since it is smaller than the sum of its proper divisors (67676724).

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

38778156 is a wasteful number, since it uses less digits than its factorization.

38778156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21151 (or 21143 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 38778156 is about 6227.2109326728. The cubic root of 38778156 is about 338.4769127526.

The spelling of 38778156 in words is "thirty-eight million, seven hundred seventy-eight thousand, one hundred fifty-six".