38161578 has 64 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 9787392.

The previous prime is 38161573. The next prime is 38161579. The reversal of 38161578 is 87516183.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (38161573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19258 + ... + 21146.

It is an arithmetic number, because the mean of its divisors is an integer number (1508220).

Almost surely, 2^38161578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38161578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

38161578 is an abundant number, since it is smaller than the sum of its proper divisors (58364502).

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

38161578 is a wasteful number, since it uses less digits than its factorization.

38161578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its digits is 40320, while the sum is 39.

The square root of 38161578 is about 6177.5058073627. The cubic root of 38161578 is about 336.6733767683.

The spelling of 38161578 in words is "thirty-eight million, one hundred sixty-one thousand, five hundred seventy-eight".