78433487 has 16 divisors (see below), whose sum is σ = 89786880. Its totient is φ = 67855200.

The previous prime is 78433471. The next prime is 78433489.

78433487 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78433487 - 2⁴ = 78433471 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78433489) 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, 20918 + ... + 24380.

It is an arithmetic number, because the mean of its divisors is an integer number (5611680).

Almost surely, 2^78433487 is an apocalyptic number.

78433487 is a deficient number, since it is larger than the sum of its proper divisors (11353393).

78433487 is a wasteful number, since it uses less digits than its factorization.

78433487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574.

The product of its digits is 451584, while the sum is 44.

The square root of 78433487 is about 8856.2682321619. The cubic root of 78433487 is about 428.0559200671.

The spelling of 78433487 in words is "seventy-eight million, four hundred thirty-three thousand, four hundred eighty-seven".