140435988 has 144 divisors (see below), whose sum is σ = 422927232. Its totient is φ = 35481600.

The previous prime is 140435959. The next prime is 140435993. The reversal of 140435988 is 889534041.

It is a super-2 number, since 2×140435988² = 39444533451072288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 416556 + ... + 416892.

Almost surely, 2^140435988 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 140435988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211463616).

140435988 is an abundant number, since it is smaller than the sum of its proper divisors (282491244).

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

140435988 is a wasteful number, since it uses less digits than its factorization.

140435988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 140435988 is about 11850.5691002584. The cubic root of 140435988 is about 519.7878671215.

The spelling of 140435988 in words is "one hundred forty million, four hundred thirty-five thousand, nine hundred eighty-eight".