140638680 has 448 divisors, whose sum is σ = 594941760. Its totient is φ = 29113344.

The previous prime is 140638643. The next prime is 140638697. The reversal of 140638680 is 86836041.

It is a happy number.

140638680 is a `hidden beast` number, since 14 + 0 + 638 + 6 + 8 + 0 = 666.

140638680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2653534 + ... + 2653586.

It is an arithmetic number, because the mean of its divisors is an integer number (1327995).

Almost surely, 2^140638680 is an apocalyptic number.

140638680 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 140638680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297470880).

140638680 is an abundant number, since it is smaller than the sum of its proper divisors (454303080).

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

140638680 is a wasteful number, since it uses less digits than its factorization.

140638680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 140638680 is about 11859.1180110496. The cubic root of 140638680 is about 520.0378177624.

The spelling of 140638680 in words is "one hundred forty million, six hundred thirty-eight thousand, six hundred eighty".