78152412 has 24 divisors (see below), whose sum is σ = 196383376. Its totient is φ = 24046848.

The previous prime is 78152411. The next prime is 78152429. The reversal of 78152412 is 21425187.

It is a super-2 number, since 2×78152412² = 12215599002835488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78152412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78152411) 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, 250333 + ... + 250644.

Almost surely, 2^78152412 is an apocalyptic number.

It is an amenable number.

78152412 is an abundant number, since it is smaller than the sum of its proper divisors (118230964).

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

78152412 is a wasteful number, since it uses less digits than its factorization.

78152412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500997 (or 500995 counting only the distinct ones).

The product of its digits is 4480, while the sum is 30.

The square root of 78152412 is about 8840.3852857214. The cubic root of 78152412 is about 427.5439796073.

Adding to 78152412 its reverse (21425187), we get a palindrome (99577599).

The spelling of 78152412 in words is "seventy-eight million, one hundred fifty-two thousand, four hundred twelve".