978628733 has 4 divisors (see below), whose sum is σ = 993235200. Its totient is φ = 964022268.

The previous prime is 978628727. The next prime is 978628793. The reversal of 978628733 is 337826879.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 978628733 - 2¹⁰ = 978627709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978628723) 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, 7303133 + ... + 7303266.

It is an arithmetic number, because the mean of its divisors is an integer number (248308800).

Almost surely, 2^978628733 is an apocalyptic number.

It is an amenable number.

978628733 is a deficient number, since it is larger than the sum of its proper divisors (14606467).

978628733 is a wasteful number, since it uses less digits than its factorization.

978628733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14606466.

The product of its digits is 3048192, while the sum is 53.

The square root of 978628733 is about 31283.0422593456. The cubic root of 978628733 is about 992.8248851912.

The spelling of 978628733 in words is "nine hundred seventy-eight million, six hundred twenty-eight thousand, seven hundred thirty-three".