728690139 has 12 divisors (see below), whose sum is σ = 1053050856. Its totient is φ = 485563392.

The previous prime is 728690129. The next prime is 728690141. The reversal of 728690139 is 931096827.

It is a de Polignac number, because none of the positive numbers 2^k-728690139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 728690094 and 728690103.

It is not an unprimeable number, because it can be changed into a prime (728690129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2139 + ... + 38235.

It is an arithmetic number, because the mean of its divisors is an integer number (87754238).

Almost surely, 2^728690139 is an apocalyptic number.

728690139 is a deficient number, since it is larger than the sum of its proper divisors (324360717).

728690139 is a wasteful number, since it uses less digits than its factorization.

728690139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38346 (or 38343 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 728690139 is about 26994.2612234527. The cubic root of 728690139 is about 899.8724671142.

The spelling of 728690139 in words is "seven hundred twenty-eight million, six hundred ninety thousand, one hundred thirty-nine".