39142866 has 48 divisors (see below), whose sum is σ = 94227840. Its totient is φ = 10795680.

The previous prime is 39142811. The next prime is 39142867. The reversal of 39142866 is 66824193.

It is not an unprimeable number, because it can be changed into a prime (39142867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6231 + ... + 10821.

It is an arithmetic number, because the mean of its divisors is an integer number (1963080).

Almost surely, 2^39142866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39142866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47113920).

39142866 is an abundant number, since it is smaller than the sum of its proper divisors (55084974).

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

39142866 is a wasteful number, since it uses less digits than its factorization.

39142866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639 (or 4632 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 39142866 is about 6256.4259765460. The cubic root of 39142866 is about 339.5347326920.

The spelling of 39142866 in words is "thirty-nine million, one hundred forty-two thousand, eight hundred sixty-six".