78462881 has 16 divisors (see below), whose sum is σ = 92897280. Its totient is φ = 64876560.

The previous prime is 78462877. The next prime is 78462899. The reversal of 78462881 is 18826487.

It is not a de Polignac number, because 78462881 - 2² = 78462877 is a prime.

It is a super-2 number, since 2×78462881² = 12312847389640322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78462841) 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, 21680 + ... + 25038.

It is an arithmetic number, because the mean of its divisors is an integer number (5806080).

Almost surely, 2^78462881 is an apocalyptic number.

78462881 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

78462881 is a deficient number, since it is larger than the sum of its proper divisors (14434399).

78462881 is a wasteful number, since it uses less digits than its factorization.

78462881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484.

The product of its digits is 172032, while the sum is 44.

The square root of 78462881 is about 8857.9275792930. The cubic root of 78462881 is about 428.1093866187.

The spelling of 78462881 in words is "seventy-eight million, four hundred sixty-two thousand, eight hundred eighty-one".