140644440 has 96 divisors (see below), whose sum is σ = 461653920. Its totient is φ = 37131264.

The previous prime is 140644429. The next prime is 140644447. The reversal of 140644440 is 44446041.

140644440 is a `hidden beast` number, since 14 + 0 + 644 + 4 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140644447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35184 + ... + 38976.

It is an arithmetic number, because the mean of its divisors is an integer number (4808895).

Almost surely, 2^140644440 is an apocalyptic number.

140644440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140644440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230826960).

140644440 is an abundant number, since it is smaller than the sum of its proper divisors (321009480).

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

140644440 is a wasteful number, since it uses less digits than its factorization.

140644440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 140644440 is about 11859.3608596754. The cubic root of 140644440 is about 520.0449172245.

The spelling of 140644440 in words is "one hundred forty million, six hundred forty-four thousand, four hundred forty".