728472738 has 32 divisors (see below), whose sum is σ = 1666267776. Its totient is φ = 207986688.

The previous prime is 728472727. The next prime is 728472739. The reversal of 728472738 is 837274827.

It is not an unprimeable number, because it can be changed into a prime (728472739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62370 + ... + 73122.

It is an arithmetic number, because the mean of its divisors is an integer number (52070868).

Almost surely, 2^728472738 is an apocalyptic number.

728472738 is an abundant number, since it is smaller than the sum of its proper divisors (937795038).

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

728472738 is a wasteful number, since it uses less digits than its factorization.

728472738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12378.

The product of its digits is 1053696, while the sum is 48.

The square root of 728472738 is about 26990.2341227341. The cubic root of 728472738 is about 899.7829674205.

The spelling of 728472738 in words is "seven hundred twenty-eight million, four hundred seventy-two thousand, seven hundred thirty-eight".