730642 has 8 divisors (see below), whose sum is σ = 1195632. Its totient is φ = 332100.

The previous prime is 730637. The next prime is 730663. The reversal of 730642 is 246037.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 33211 = 730642 / (7 + 3 + 0 + 6 + 4 + 2).

It is an unprimeable number.

730642 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16584 + ... + 16627.

It is an arithmetic number, because the mean of its divisors is an integer number (149454).

2⁷³⁰⁶⁴² is an apocalyptic number.

730642 is a deficient number, since it is larger than the sum of its proper divisors (464990).

730642 is a wasteful number, since it uses less digits than its factorization.

730642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33224.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 730642 is about 854.7759940476. The cubic root of 730642 is about 90.0675213468.

Adding to 730642 its reverse (246037), we get a palindrome (976679).

The spelling of 730642 in words is "seven hundred thirty thousand, six hundred forty-two".