730021396 has 72 divisors (see below), whose sum is σ = 1450535240. Its totient is φ = 319313664.

The previous prime is 730021393. The next prime is 730021399. The reversal of 730021396 is 693120037.

It is an interprime number because it is at equal distance from previous prime (730021393) and next prime (730021399).

It can be written as a sum of positive squares in 4 ways, for example, as 184144900 + 545876496 = 13570^2 + 23364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730021393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6697390 + ... + 6697498.

Almost surely, 2^730021396 is an apocalyptic number.

It is an amenable number.

730021396 is a deficient number, since it is larger than the sum of its proper divisors (720513844).

730021396 is a wasteful number, since it uses less digits than its factorization.

730021396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 730021396 is about 27018.9081200555. The cubic root of 730021396 is about 900.4201314188.

The spelling of 730021396 in words is "seven hundred thirty million, twenty-one thousand, three hundred ninety-six".