728179830 has 48 divisors (see below), whose sum is σ = 2163736224. Its totient is φ = 166440960.

The previous prime is 728179783. The next prime is 728179831. The reversal of 728179830 is 38971827.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728179831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 577291 + ... + 578550.

It is an arithmetic number, because the mean of its divisors is an integer number (45077838).

Almost surely, 2^728179830 is an apocalyptic number.

728179830 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

728179830 is an abundant number, since it is smaller than the sum of its proper divisors (1435556394).

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

728179830 is a wasteful number, since it uses less digits than its factorization.

728179830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155861 (or 1155858 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 728179830 is about 26984.8073923087. The cubic root of 728179830 is about 899.6623548259.

The spelling of 728179830 in words is "seven hundred twenty-eight million, one hundred seventy-nine thousand, eight hundred thirty".