76840406 has 8 divisors (see below), whose sum is σ = 115510944. Its totient is φ = 38336760.

The previous prime is 76840399. The next prime is 76840409. The reversal of 76840406 is 60404867.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76840409) 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, 40565 + ... + 42416.

It is an arithmetic number, because the mean of its divisors is an integer number (14438868).

Almost surely, 2^76840406 is an apocalyptic number.

76840406 is a deficient number, since it is larger than the sum of its proper divisors (38670538).

76840406 is a wasteful number, since it uses less digits than its factorization.

76840406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83446.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 76840406 is about 8765.8659583637. The cubic root of 76840406 is about 425.1379593644.

The spelling of 76840406 in words is "seventy-six million, eight hundred forty thousand, four hundred six".