140212644 has 96 divisors (see below), whose sum is σ = 388644480. Its totient is φ = 38784000.

The previous prime is 140212619. The next prime is 140212663. The reversal of 140212644 is 446212041.

It is a happy number.

140212644 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 31 ways as a sum of consecutive naturals, for example, 172912 + ... + 173720.

It is an arithmetic number, because the mean of its divisors is an integer number (4048380).

Almost surely, 2^140212644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140212644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194322240).

140212644 is an abundant number, since it is smaller than the sum of its proper divisors (248431836).

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

140212644 is a wasteful number, since it uses less digits than its factorization.

140212644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 140212644 is about 11841.1420057358. The cubic root of 140212644 is about 519.5121706993.

Adding to 140212644 its reverse (446212041), we get a palindrome (586424685).

The spelling of 140212644 in words is "one hundred forty million, two hundred twelve thousand, six hundred forty-four".