140257728 has 84 divisors (see below), whose sum is σ = 432971448. Its totient is φ = 43153920.

The previous prime is 140257699. The next prime is 140257739. The reversal of 140257728 is 827752041.

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 = 140257692 and 140257701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1878 + ... + 16853.

It is an arithmetic number, because the mean of its divisors is an integer number (5154422).

Almost surely, 2^140257728 is an apocalyptic number.

140257728 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 140257728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216485724).

140257728 is an abundant number, since it is smaller than the sum of its proper divisors (292713720).

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

140257728 is a wasteful number, since it uses less digits than its factorization.

140257728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18762 (or 18749 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 140257728 is about 11843.0455542483. The cubic root of 140257728 is about 519.5678460796.

The spelling of 140257728 in words is "one hundred forty million, two hundred fifty-seven thousand, seven hundred twenty-eight".