140491728 has 180 divisors, whose sum is σ = 446033952. Its totient is φ = 41184000.

The previous prime is 140491727. The next prime is 140491733. The reversal of 140491728 is 827194041.

140491728 is a `hidden beast` number, since 140 + 491 + 7 + 28 = 666.

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 = 140491692 and 140491701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140491727) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 559603 + ... + 559853.

Almost surely, 2^140491728 is an apocalyptic number.

140491728 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 140491728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223016976).

140491728 is an abundant number, since it is smaller than the sum of its proper divisors (305542224).

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

140491728 is a wasteful number, since it uses less digits than its factorization.

140491728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 140491728 is about 11852.9206527337. The cubic root of 140491728 is about 519.8566271400.

The spelling of 140491728 in words is "one hundred forty million, four hundred ninety-one thousand, seven hundred twenty-eight".