78338212 has 12 divisors (see below), whose sum is σ = 137165616. Its totient is φ = 39148040.

The previous prime is 78338203. The next prime is 78338243. The reversal of 78338212 is 21283387.

It is a super-2 number, since 2×78338212² = 12273750918713888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5583 + ... + 13705.

It is an arithmetic number, because the mean of its divisors is an integer number (11430468).

Almost surely, 2^78338212 is an apocalyptic number.

It is an amenable number.

78338212 is a deficient number, since it is larger than the sum of its proper divisors (58827404).

78338212 is a wasteful number, since it uses less digits than its factorization.

78338212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10538 (or 10536 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 78338212 is about 8850.8876391015. The cubic root of 78338212 is about 427.8825266443.

The spelling of 78338212 in words is "seventy-eight million, three hundred thirty-eight thousand, two hundred twelve".