730347840 has 280 divisors, whose sum is σ = 2736555360. Its totient is φ = 184384512.

The previous prime is 730347833. The next prime is 730347841. The reversal of 730347840 is 48743037.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 730347795 and 730347804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730347841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 491739 + ... + 493221.

It is an arithmetic number, because the mean of its divisors is an integer number (9773412).

Almost surely, 2^730347840 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 730347840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368277680).

730347840 is an abundant number, since it is smaller than the sum of its proper divisors (2006207520).

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

730347840 is a wasteful number, since it uses less digits than its factorization.

730347840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 730347840 is about 27024.9484735864. The cubic root of 730347840 is about 900.5543251783.

The spelling of 730347840 in words is "seven hundred thirty million, three hundred forty-seven thousand, eight hundred forty".