728994390 has 16 divisors (see below), whose sum is σ = 1749586608. Its totient is φ = 194398496.

The previous prime is 728994349. The next prime is 728994397. The reversal of 728994390 is 93499827.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728994397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12149877 + ... + 12149936.

It is an arithmetic number, because the mean of its divisors is an integer number (109349163).

Almost surely, 2^728994390 is an apocalyptic number.

728994390 is an abundant number, since it is smaller than the sum of its proper divisors (1020592218).

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

728994390 is a wasteful number, since it uses less digits than its factorization.

728994390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24299823.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 728994390 is about 26999.8961109112. The cubic root of 728994390 is about 899.9976913521.

The spelling of 728994390 in words is "seven hundred twenty-eight million, nine hundred ninety-four thousand, three hundred ninety".