730312989 has 32 divisors (see below), whose sum is σ = 1144433664. Its totient is φ = 405578880.

The previous prime is 730312981. The next prime is 730312991. The reversal of 730312989 is 989213037.

It is not a de Polignac number, because 730312989 - 2³ = 730312981 is a prime.

It is a super-2 number, since 2×730312989² = 1066714123804228242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 730312989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730312981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188617 + ... + 192449.

It is an arithmetic number, because the mean of its divisors is an integer number (35763552).

Almost surely, 2^730312989 is an apocalyptic number.

It is an amenable number.

730312989 is a deficient number, since it is larger than the sum of its proper divisors (414120675).

730312989 is a wasteful number, since it uses less digits than its factorization.

730312989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 730312989 is about 27024.3036728053. The cubic root of 730312989 is about 900.5400006258.

The spelling of 730312989 in words is "seven hundred thirty million, three hundred twelve thousand, nine hundred eighty-nine".