78242612 has 18 divisors (see below), whose sum is σ = 159280002. Its totient is φ = 33532464.

The previous prime is 78242603. The next prime is 78242629. The reversal of 78242612 is 21624287.

It can be written as a sum of positive squares in only one way, i.e., 73891216 + 4351396 = 8596^2 + 2086^2 .

It is a super-2 number, since 2×78242612² = 12243812665165088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199403 + ... + 199794.

It is an arithmetic number, because the mean of its divisors is an integer number (8848889).

Almost surely, 2^78242612 is an apocalyptic number.

It is an amenable number.

78242612 is an abundant number, since it is smaller than the sum of its proper divisors (81037390).

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

78242612 is a wasteful number, since it uses less digits than its factorization.

78242612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399215 (or 399206 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 78242612 is about 8845.4854021699. The cubic root of 78242612 is about 427.7084003804.

Adding to 78242612 its reverse (21624287), we get a palindrome (99866899).

The spelling of 78242612 in words is "seventy-eight million, two hundred forty-two thousand, six hundred twelve".