140617640 has 16 divisors (see below), whose sum is σ = 316389780. Its totient is φ = 56247040.

The previous prime is 140617619. The next prime is 140617661. The reversal of 140617640 is 46716041.

It is an interprime number because it is at equal distance from previous prime (140617619) and next prime (140617661).

It can be written as a sum of positive squares in 2 ways, for example, as 140612164 + 5476 = 11858^2 + 74^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757681 + ... + 1757760.

Almost surely, 2^140617640 is an apocalyptic number.

140617640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140617640 is an abundant number, since it is smaller than the sum of its proper divisors (175772140).

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

140617640 is a wasteful number, since it uses less digits than its factorization.

140617640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515452 (or 3515448 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 140617640 is about 11858.2308967232. The cubic root of 140617640 is about 520.0118833576.

The spelling of 140617640 in words is "one hundred forty million, six hundred seventeen thousand, six hundred forty".