78412243 has 16 divisors (see below), whose sum is σ = 96820416. Its totient is φ = 61839360.

The previous prime is 78412241. The next prime is 78412249. The reversal of 78412243 is 34221487.

78412243 = T₁₂₆₇ + T₁₂₆₈ + ... + T₁₃₅₇.

It is a cyclic number.

It is not a de Polignac number, because 78412243 - 2¹ = 78412241 is a prime.

It is a super-2 number, since 2×78412243² = 12296959704582098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78412241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30903 + ... + 33343.

It is an arithmetic number, because the mean of its divisors is an integer number (6051276).

Almost surely, 2^78412243 is an apocalyptic number.

78412243 is a deficient number, since it is larger than the sum of its proper divisors (18408173).

78412243 is a wasteful number, since it uses less digits than its factorization.

78412243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814.

The product of its digits is 10752, while the sum is 31.

The square root of 78412243 is about 8855.0687744365. The cubic root of 78412243 is about 428.0172697343.

The spelling of 78412243 in words is "seventy-eight million, four hundred twelve thousand, two hundred forty-three".