140863866 has 96 divisors (see below), whose sum is σ = 339308352. Its totient is φ = 38638080.

The previous prime is 140863859. The next prime is 140863897. The reversal of 140863866 is 668368041.

It is a happy number.

140863866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 814156 + ... + 814328.

It is an arithmetic number, because the mean of its divisors is an integer number (3534462).

Almost surely, 2^140863866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140863866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169654176).

140863866 is an abundant number, since it is smaller than the sum of its proper divisors (198444486).

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

140863866 is a wasteful number, since it uses less digits than its factorization.

140863866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 140863866 is about 11868.6084272757. The cubic root of 140863866 is about 520.3152255374.

The spelling of 140863866 in words is "one hundred forty million, eight hundred sixty-three thousand, eight hundred sixty-six".