140407644 has 96 divisors (see below), whose sum is σ = 375316480. Its totient is φ = 40497408.

The previous prime is 140407639. The next prime is 140407661. The reversal of 140407644 is 446704041.

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, 376242 + ... + 376614.

Almost surely, 2^140407644 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 140407644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187658240).

140407644 is an abundant number, since it is smaller than the sum of its proper divisors (234908836).

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

140407644 is a wasteful number, since it uses less digits than its factorization.

140407644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 140407644 is about 11849.3731479771. The cubic root of 140407644 is about 519.7528954147.

The spelling of 140407644 in words is "one hundred forty million, four hundred seven thousand, six hundred forty-four".