140770728 has 72 divisors (see below), whose sum is σ = 443510730. Its totient is φ = 40219200.

The previous prime is 140770717. The next prime is 140770769. The reversal of 140770728 is 827077041.

It can be written as a sum of positive squares in only one way, i.e., 139287204 + 1483524 = 11802^2 + 1218^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 = 140770692 and 140770701.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16423 + ... + 23478.

Almost surely, 2^140770728 is an apocalyptic number.

140770728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

140770728 is an abundant number, since it is smaller than the sum of its proper divisors (302740002).

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

140770728 is a wasteful number, since it uses less digits than its factorization.

140770728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39927 (or 39913 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 140770728 is about 11864.6840665902. The cubic root of 140770728 is about 520.2005242411.

The spelling of 140770728 in words is "one hundred forty million, seven hundred seventy thousand, seven hundred twenty-eight".