140857640 has 256 divisors, whose sum is σ = 435456000. Its totient is φ = 39674880.

The previous prime is 140857627. The next prime is 140857663. The reversal of 140857640 is 46758041.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 140857640.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1697039 + ... + 1697121.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^140857640 is an apocalyptic number.

140857640 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 140857640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217728000).

140857640 is an abundant number, since it is smaller than the sum of its proper divisors (294598360).

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

140857640 is a wasteful number, since it uses less digits than its factorization.

140857640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 140857640 is about 11868.3461358354. The cubic root of 140857640 is about 520.3075596720.

The spelling of 140857640 in words is "one hundred forty million, eight hundred fifty-seven thousand, six hundred forty".