78285213 has 12 divisors (see below), whose sum is σ = 113970688. Its totient is φ = 51778440.

The previous prime is 78285197. The next prime is 78285223. The reversal of 78285213 is 31258287.

It is not a de Polignac number, because 78285213 - 2⁴ = 78285197 is a prime.

It is a super-2 number, since 2×78285213² = 12257149148910738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78285223) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 33103 + ... + 35388.

Almost surely, 2^78285213 is an apocalyptic number.

It is an amenable number.

78285213 is a deficient number, since it is larger than the sum of its proper divisors (35685475).

78285213 is a wasteful number, since it uses less digits than its factorization.

78285213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68624 (or 68621 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 78285213 is about 8847.8931390473. The cubic root of 78285213 is about 427.7860115404.

It can be divided in two parts, 7828 and 5213, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 78285213 in words is "seventy-eight million, two hundred eighty-five thousand, two hundred thirteen".