140260640 has 48 divisors (see below), whose sum is σ = 356860728. Its totient is φ = 51787776.

The previous prime is 140260639. The next prime is 140260661. The reversal of 140260640 is 46062041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 99760144 + 40500496 = 9988^2 + 6364^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31637 + ... + 35796.

Almost surely, 2^140260640 is an apocalyptic number.

140260640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140260640 is an abundant number, since it is smaller than the sum of its proper divisors (216600088).

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

140260640 is a wasteful number, since it uses less digits than its factorization.

140260640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67461 (or 67453 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 140260640 is about 11843.1684949594. The cubic root of 140260640 is about 519.5714417724.

The spelling of 140260640 in words is "one hundred forty million, two hundred sixty thousand, six hundred forty".