78406283 has 4 divisors (see below), whose sum is σ = 79139160. Its totient is φ = 77673408.

The previous prime is 78406267. The next prime is 78406291. The reversal of 78406283 is 38260487.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78406283 - 2⁴ = 78406267 is a prime.

It is a super-2 number, since 2×78406283² = 12295090427752178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78406253) 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, 366278 + ... + 366491.

It is an arithmetic number, because the mean of its divisors is an integer number (19784790).

Almost surely, 2^78406283 is an apocalyptic number.

78406283 is a deficient number, since it is larger than the sum of its proper divisors (732877).

78406283 is a wasteful number, since it uses less digits than its factorization.

78406283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732876.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 78406283 is about 8854.7322376230. The cubic root of 78406283 is about 428.0064251372.

The spelling of 78406283 in words is "seventy-eight million, four hundred six thousand, two hundred eighty-three".