730632421 has 8 divisors (see below), whose sum is σ = 770261184. Its totient is φ = 691658880.

The previous prime is 730632389. The next prime is 730632431. The reversal of 730632421 is 124236037.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 730632421 - 2⁵ = 730632389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 730632421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730632431) 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, 161515 + ... + 165976.

It is an arithmetic number, because the mean of its divisors is an integer number (96282648).

Almost surely, 2^730632421 is an apocalyptic number.

It is an amenable number.

730632421 is a deficient number, since it is larger than the sum of its proper divisors (39628763).

730632421 is a wasteful number, since it uses less digits than its factorization.

730632421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327611.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 730632421 is about 27030.2131142172. The cubic root of 730632421 is about 900.6712773833.

Adding to 730632421 its reverse (124236037), we get a palindrome (854868458).

The spelling of 730632421 in words is "seven hundred thirty million, six hundred thirty-two thousand, four hundred twenty-one".