140009766 has 64 divisors (see below), whose sum is σ = 311098368. Its totient is φ = 41741568.

The previous prime is 140009747. The next prime is 140009783. The reversal of 140009766 is 667900041.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381315 + ... + 381681.

It is an arithmetic number, because the mean of its divisors is an integer number (4860912).

Almost surely, 2^140009766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140009766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155549184).

140009766 is an abundant number, since it is smaller than the sum of its proper divisors (171088602).

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

140009766 is a wasteful number, since it uses less digits than its factorization.

140009766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 140009766 is about 11832.5722478251. The cubic root of 140009766 is about 519.2614836895.

The spelling of 140009766 in words is "one hundred forty million, nine thousand, seven hundred sixty-six".