140931840 has 288 divisors, whose sum is σ = 529804800. Its totient is φ = 31911936.

The previous prime is 140931839. The next prime is 140931841. The reversal of 140931840 is 48139041.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (140931839) and next prime (140931841).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 140931798 and 140931807.

It is not an unprimeable number, because it can be changed into a prime (140931841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1317067 + ... + 1317173.

It is an arithmetic number, because the mean of its divisors is an integer number (1839600).

Almost surely, 2^140931840 is an apocalyptic number.

140931840 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 140931840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264902400).

140931840 is an abundant number, since it is smaller than the sum of its proper divisors (388872960).

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

140931840 is an equidigital number, since it uses as much as digits as its factorization.

140931840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 140931840 is about 11871.4716863580. The cubic root of 140931840 is about 520.3989049572.

The spelling of 140931840 in words is "one hundred forty million, nine hundred thirty-one thousand, eight hundred forty".