730400004 has 60 divisors (see below), whose sum is σ = 1936363968. Its totient is φ = 240030000.

The previous prime is 730399997. The next prime is 730400023. The reversal of 730400004 is 400004037.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 730400004.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7129 + ... + 38879.

Almost surely, 2^730400004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 730400004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968181984).

730400004 is an abundant number, since it is smaller than the sum of its proper divisors (1205963964).

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

730400004 is a wasteful number, since it uses less digits than its factorization.

730400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31838 (or 31827 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 730400004 is about 27025.9135645772. The cubic root of 730400004 is about 900.5757649156.

The spelling of 730400004 in words is "seven hundred thirty million, four hundred thousand, four".