140236866 has 128 divisors (see below), whose sum is σ = 402278400. Its totient is φ = 35138880.

The previous prime is 140236849. The next prime is 140236867. The reversal of 140236866 is 668632041.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 140236866.

It is not an unprimeable number, because it can be changed into a prime (140236867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120001 + ... + 121163.

It is an arithmetic number, because the mean of its divisors is an integer number (3142800).

Almost surely, 2^140236866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140236866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201139200).

140236866 is an abundant number, since it is smaller than the sum of its proper divisors (262041534).

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

140236866 is a wasteful number, since it uses less digits than its factorization.

140236866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 140236866 is about 11842.1647514295. The cubic root of 140236866 is about 519.5420845476.

The spelling of 140236866 in words is "one hundred forty million, two hundred thirty-six thousand, eight hundred sixty-six".