78018012 has 24 divisors (see below), whose sum is σ = 202269200. Its totient is φ = 26005968.

The previous prime is 78018011. The next prime is 78018013. The reversal of 78018012 is 21081087.

It is an interprime number because it is at equal distance from previous prime (78018011) and next prime (78018013).

It is a super-3 number, since 3×78018012³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78018011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361087 + ... + 361302.

Almost surely, 2^78018012 is an apocalyptic number.

It is an amenable number.

78018012 is an abundant number, since it is smaller than the sum of its proper divisors (124251188).

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

78018012 is a wasteful number, since it uses less digits than its factorization.

78018012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722402 (or 722394 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 78018012 is about 8832.7805361619. The cubic root of 78018012 is about 427.2987541549.

Adding to 78018012 its reverse (21081087), we get a palindrome (99099099).

The spelling of 78018012 in words is "seventy-eight million, eighteen thousand, twelve".