140401728 has 112 divisors (see below), whose sum is σ = 426232320. Its totient is φ = 45273600.

The previous prime is 140401727. The next prime is 140401733. The reversal of 140401728 is 827104041.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (140401727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52258 + ... + 54878.

Almost surely, 2^140401728 is an apocalyptic number.

140401728 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 140401728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213116160).

140401728 is an abundant number, since it is smaller than the sum of its proper divisors (285830592).

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

140401728 is a wasteful number, since it uses less digits than its factorization.

140401728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673 (or 2657 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 140401728 is about 11849.1235118890. The cubic root of 140401728 is about 519.7455954767.

Adding to 140401728 its reverse (827104041), we get a palindrome (967505769).

The spelling of 140401728 in words is "one hundred forty million, four hundred one thousand, seven hundred twenty-eight".