78461312 has 32 divisors (see below), whose sum is σ = 160543920. Its totient is φ = 38168064.

The previous prime is 78461293. The next prime is 78461321. The reversal of 78461312 is 21316487.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×78461312² = 12312354961522688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3548 + ... + 13019.

Almost surely, 2^78461312 is an apocalyptic number.

It is an amenable number.

78461312 is an abundant number, since it is smaller than the sum of its proper divisors (82082608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78461312 is a wasteful number, since it uses less digits than its factorization.

78461312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16618 (or 16606 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 78461312 is about 8857.8390141163. The cubic root of 78461312 is about 428.1065330056.

Adding to 78461312 its reverse (21316487), we get a palindrome (99777799).

The spelling of 78461312 in words is "seventy-eight million, four hundred sixty-one thousand, three hundred twelve".