78889481 has 8 divisors (see below), whose sum is σ = 86824224. Its totient is φ = 71081920.

The previous prime is 78889429. The next prime is 78889507. The reversal of 78889481 is 18498887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78889481 - 2¹⁰ = 78888457 is a prime.

It is a super-2 number, since 2×78889481² = 12447100424898722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78889411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30491 + ... + 32976.

It is an arithmetic number, because the mean of its divisors is an integer number (10853028).

Almost surely, 2^78889481 is an apocalyptic number.

It is an amenable number.

78889481 is a deficient number, since it is larger than the sum of its proper divisors (7934743).

78889481 is a wasteful number, since it uses less digits than its factorization.

78889481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63591.

The product of its digits is 1032192, while the sum is 53.

The square root of 78889481 is about 8881.9750618880. The cubic root of 78889481 is about 428.8838567509.

The spelling of 78889481 in words is "seventy-eight million, eight hundred eighty-nine thousand, four hundred eighty-one".