140806728 has 64 divisors (see below), whose sum is σ = 393292800. Its totient is φ = 46676160.

The previous prime is 140806723. The next prime is 140806741. The reversal of 140806728 is 827608041.

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

It is a junction number, because it is equal to n+sod(n) for n = 140806692 and 140806701.

It is not an unprimeable number, because it can be changed into a prime (140806723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39550 + ... + 42962.

It is an arithmetic number, because the mean of its divisors is an integer number (6145200).

Almost surely, 2^140806728 is an apocalyptic number.

140806728 is a gapful number since it is divisible by the number (18) 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 140806728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196646400).

140806728 is an abundant number, since it is smaller than the sum of its proper divisors (252486072).

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

140806728 is a wasteful number, since it uses less digits than its factorization.

140806728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619 (or 3609 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 140806728 is about 11866.2010770086. The cubic root of 140806728 is about 520.2448649526.

The spelling of 140806728 in words is "one hundred forty million, eight hundred six thousand, seven hundred twenty-eight".