730406528 has 32 divisors (see below), whose sum is σ = 1505290500. Its totient is φ = 352608256.

The previous prime is 730406491. The next prime is 730406533. The reversal of 730406528 is 825604037.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 722964544 + 7441984 = 26888^2 + 2728^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×730406528² = 1066987392290029568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94673 + ... + 102096.

Almost surely, 2^730406528 is an apocalyptic number.

It is an amenable number.

730406528 is an abundant number, since it is smaller than the sum of its proper divisors (774883972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

730406528 is a wasteful number, since it uses less digits than its factorization.

730406528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196812 (or 196800 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 730406528 is about 27026.0342632803. The cubic root of 730406528 is about 900.5784462495.

The spelling of 730406528 in words is "seven hundred thirty million, four hundred six thousand, five hundred twenty-eight".