978028571 has 4 divisors (see below), whose sum is σ = 1053261552. Its totient is φ = 902795592.

The previous prime is 978028559. The next prime is 978028573. The reversal of 978028571 is 175820879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175820879 = 13 ⋅13524683.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978028571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978028573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37616471 + ... + 37616496.

It is an arithmetic number, because the mean of its divisors is an integer number (263315388).

Almost surely, 2^978028571 is an apocalyptic number.

978028571 is a deficient number, since it is larger than the sum of its proper divisors (75232981).

978028571 is a wasteful number, since it uses less digits than its factorization.

978028571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75232980.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 978028571 is about 31273.4483388065. The cubic root of 978028571 is about 992.6218876714.

The spelling of 978028571 in words is "nine hundred seventy-eight million, twenty-eight thousand, five hundred seventy-one".