978240733 has 4 divisors (see below), whose sum is σ = 983206620. Its totient is φ = 973274848.

The previous prime is 978240727. The next prime is 978240737. The reversal of 978240733 is 337042879.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 760766724 + 217474009 = 27582^2 + 14747^2 .

It is a cyclic number.

It is not a de Polignac number, because 978240733 - 2⁵ = 978240701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 978240733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978240737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2482648 + ... + 2483041.

It is an arithmetic number, because the mean of its divisors is an integer number (245801655).

Almost surely, 2^978240733 is an apocalyptic number.

It is an amenable number.

978240733 is a deficient number, since it is larger than the sum of its proper divisors (4965887).

978240733 is a wasteful number, since it uses less digits than its factorization.

978240733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965886.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 978240733 is about 31276.8402016572. The cubic root of 978240733 is about 992.6936583827.

The spelling of 978240733 in words is "nine hundred seventy-eight million, two hundred forty thousand, seven hundred thirty-three".