78389283 has 16 divisors (see below), whose sum is σ = 120613376. Its totient is φ = 44357760.

The previous prime is 78389281. The next prime is 78389303. The reversal of 78389283 is 38298387.

It is not a de Polignac number, because 78389283 - 2¹ = 78389281 is a prime.

It is a super-2 number, since 2×78389283² = 12289759378508178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78389281) 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, 15958 + ... + 20283.

It is an arithmetic number, because the mean of its divisors is an integer number (7538336).

Almost surely, 2^78389283 is an apocalyptic number.

78389283 is a deficient number, since it is larger than the sum of its proper divisors (42224093).

78389283 is a wasteful number, since it uses less digits than its factorization.

78389283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36354.

The product of its digits is 580608, while the sum is 48.

The square root of 78389283 is about 8853.7722469013. The cubic root of 78389283 is about 427.9754895417.

The spelling of 78389283 in words is "seventy-eight million, three hundred eighty-nine thousand, two hundred eighty-three".