728403870 has 32 divisors (see below), whose sum is σ = 1749421440. Its totient is φ = 194101920.

The previous prime is 728403853. The next prime is 728403877. The reversal of 728403870 is 78304827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728403877) 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, 38001 + ... + 53859.

It is an arithmetic number, because the mean of its divisors is an integer number (54669420).

Almost surely, 2^728403870 is an apocalyptic number.

728403870 is an abundant number, since it is smaller than the sum of its proper divisors (1021017570).

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

728403870 is a wasteful number, since it uses less digits than its factorization.

728403870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17400.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 728403870 is about 26988.9582977928. The cubic root of 728403870 is about 899.7546121126.

The spelling of 728403870 in words is "seven hundred twenty-eight million, four hundred three thousand, eight hundred seventy".