78490933 has 12 divisors (see below), whose sum is σ = 82063044. Its totient is φ = 75046400.

The previous prime is 78490931. The next prime is 78490939. The reversal of 78490933 is 33909487.

It can be written as a sum of positive squares in 6 ways, for example, as 26967249 + 51523684 = 5193^2 + 7178^2 .

It is not a de Polignac number, because 78490933 - 2¹ = 78490931 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 78490933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78490931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88653 + ... + 89533.

It is an arithmetic number, because the mean of its divisors is an integer number (6838587).

Almost surely, 2^78490933 is an apocalyptic number.

It is an amenable number.

78490933 is a deficient number, since it is larger than the sum of its proper divisors (3572111).

78490933 is an equidigital number, since it uses as much as digits as its factorization.

78490933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 78490933 is about 8859.5108781467. The cubic root of 78490933 is about 428.1603996729.

The spelling of 78490933 in words is "seventy-eight million, four hundred ninety thousand, nine hundred thirty-three".