78411487 has 16 divisors (see below), whose sum is σ = 98323200. Its totient is φ = 60747840.

The previous prime is 78411479. The next prime is 78411503.

78411487 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 78411487 - 2³ = 78411479 is a prime.

It is a super-2 number, since 2×78411487² = 12296722587102338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78411407) 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 15 ways as a sum of consecutive naturals, for example, 10939 + ... + 16627.

It is an arithmetic number, because the mean of its divisors is an integer number (6145200).

Almost surely, 2^78411487 is an apocalyptic number.

78411487 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78411487 is a deficient number, since it is larger than the sum of its proper divisors (19911713).

78411487 is a wasteful number, since it uses less digits than its factorization.

78411487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886.

The product of its digits is 50176, while the sum is 40.

The square root of 78411487 is about 8855.0260869181. The cubic root of 78411487 is about 428.0158941749.

The spelling of 78411487 in words is "seventy-eight million, four hundred eleven thousand, four hundred eighty-seven".