38861830 has 64 divisors (see below), whose sum is σ = 85691520. Its totient is φ = 12429312.

The previous prime is 38861807. The next prime is 38861833. The reversal of 38861830 is 3816883.

It is a self number, because there is not a number n which added to its sum of digits gives 38861830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38861833) 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, 343854 + ... + 343966.

It is an arithmetic number, because the mean of its divisors is an integer number (1338930).

Almost surely, 2^38861830 is an apocalyptic number.

38861830 is an abundant number, since it is smaller than the sum of its proper divisors (46829690).

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

38861830 is a wasteful number, since it uses less digits than its factorization.

38861830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 38861830 is about 6233.9257294260. The cubic root of 38861830 is about 338.7201886412.

The spelling of 38861830 in words is "thirty-eight million, eight hundred sixty-one thousand, eight hundred thirty".