786406 has 4 divisors (see below), whose sum is σ = 1179612. Its totient is φ = 393202.

The previous prime is 786371. The next prime is 786407. The reversal of 786406 is 604687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604687 = 101 ⋅5987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (786407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196600 + ... + 196603.

It is an arithmetic number, because the mean of its divisors is an integer number (294903).

2⁷⁸⁶⁴⁰⁶ is an apocalyptic number.

786406 is a deficient number, since it is larger than the sum of its proper divisors (393206).

786406 is a wasteful number, since it uses less digits than its factorization.

786406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393205.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 786406 is about 886.7953540699. The cubic root of 786406 is about 92.3029552769.

The spelling of 786406 in words is "seven hundred eighty-six thousand, four hundred six".