730881 has 18 divisors (see below), whose sum is σ = 1125462. Its totient is φ = 456960.

The previous prime is 730879. The next prime is 730889. The reversal of 730881 is 188037.

It can be written as a sum of positive squares in 3 ways, for example, as 360000 + 370881 = 600^2 + 609^2 .

It is not a de Polignac number, because 730881 - 2¹ = 730879 is a prime.

It is a super-2 number, since 2×730881² = 1068374072322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (730889) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2461 + ... + 2741.

2⁷³⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

730881 is a deficient number, since it is larger than the sum of its proper divisors (394581).

730881 is a wasteful number, since it uses less digits than its factorization.

730881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 730881 is about 854.9157853263. The cubic root of 730881 is about 90.0773409259.

The spelling of 730881 in words is "seven hundred thirty thousand, eight hundred eighty-one".