78303212 has 12 divisors (see below), whose sum is σ = 147571536. Its totient is φ = 36139920.

The previous prime is 78303209. The next prime is 78303217. The reversal of 78303212 is 21230387.

It is a super-2 number, since 2×78303212² = 12262786019033888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78303217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752864 + ... + 752967.

It is an arithmetic number, because the mean of its divisors is an integer number (12297628).

Almost surely, 2^78303212 is an apocalyptic number.

It is an amenable number.

78303212 is a deficient number, since it is larger than the sum of its proper divisors (69268324).

78303212 is a wasteful number, since it uses less digits than its factorization.

78303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505848 (or 1505846 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 78303212 is about 8848.9102153881. The cubic root of 78303212 is about 427.8187939358.

Adding to 78303212 its reverse (21230387), we get a palindrome (99533599).

The spelling of 78303212 in words is "seventy-eight million, three hundred three thousand, two hundred twelve".