38122778 has 16 divisors (see below), whose sum is σ = 60372000. Its totient is φ = 18004752.

The previous prime is 38122771. The next prime is 38122783. The reversal of 38122778 is 87722183.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38122771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13493 + ... + 16071.

It is an arithmetic number, because the mean of its divisors is an integer number (3773250).

Almost surely, 2^38122778 is an apocalyptic number.

38122778 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

38122778 is a deficient number, since it is larger than the sum of its proper divisors (22249222).

38122778 is a wasteful number, since it uses less digits than its factorization.

38122778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989.

The product of its digits is 37632, while the sum is 38.

The square root of 38122778 is about 6174.3645826919. The cubic root of 38122778 is about 336.5592361644.

It can be divided in two parts, 38122 and 778, that multiplied together give a square (29658916 = 5446²).

The spelling of 38122778 in words is "thirty-eight million, one hundred twenty-two thousand, seven hundred seventy-eight".