9780390529 has 16 divisors (see below), whose sum is σ = 12241434240. Its totient is φ = 7607168640.

The previous prime is 9780390497. The next prime is 9780390559. The reversal of 9780390529 is 9250930879.

It is a cyclic number.

It is not a de Polignac number, because 9780390529 - 2⁵ = 9780390497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9780390559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905452 + ... + 916189.

It is an arithmetic number, because the mean of its divisors is an integer number (765089640).

Almost surely, 2^9780390529 is an apocalyptic number.

It is an amenable number.

9780390529 is a deficient number, since it is larger than the sum of its proper divisors (2461043711).

9780390529 is a wasteful number, since it uses less digits than its factorization.

9780390529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821720.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The square root of 9780390529 is about 98895.8569860234. The cubic root of 9780390529 is about 2138.5466686993.

The spelling of 9780390529 in words is "nine billion, seven hundred eighty million, three hundred ninety thousand, five hundred twenty-nine".