728370140 has 12 divisors (see below), whose sum is σ = 1529577336. Its totient is φ = 291348048.

The previous prime is 728370131. The next prime is 728370143. The reversal of 728370140 is 41073827.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 728370097 and 728370106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728370143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18209234 + ... + 18209273.

It is an arithmetic number, because the mean of its divisors is an integer number (127464778).

Almost surely, 2^728370140 is an apocalyptic number.

It is an amenable number.

728370140 is an abundant number, since it is smaller than the sum of its proper divisors (801207196).

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

728370140 is a wasteful number, since it uses less digits than its factorization.

728370140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36418516 (or 36418514 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 728370140 is about 26988.3334053809. Note that the first 3 decimals coincide. The cubic root of 728370140 is about 899.7407236675.

The spelling of 728370140 in words is "seven hundred twenty-eight million, three hundred seventy thousand, one hundred forty".