140635440 has 200 divisors, whose sum is σ = 533122128. Its totient is φ = 34076160.

The previous prime is 140635427. The next prime is 140635457. The reversal of 140635440 is 44536041.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 70294 + ... + 72266.

Almost surely, 2^140635440 is an apocalyptic number.

140635440 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 140635440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266561064).

140635440 is an abundant number, since it is smaller than the sum of its proper divisors (392486688).

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

140635440 is a wasteful number, since it uses less digits than its factorization.

140635440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009 (or 1994 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 140635440 is about 11858.9814065121. The cubic root of 140635440 is about 520.0338242298.

It can be divided in two parts, 14063 and 5440, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 140635440 in words is "one hundred forty million, six hundred thirty-five thousand, four hundred forty".