76820426 has 8 divisors (see below), whose sum is σ = 117404964. Its totient is φ = 37685440.

The previous prime is 76820423. The next prime is 76820441. The reversal of 76820426 is 62402867.

It can be written as a sum of positive squares in 2 ways, for example, as 75707401 + 1113025 = 8701^2 + 1055^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76820423) 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 3 ways as a sum of consecutive naturals, for example, 362255 + ... + 362466.

Almost surely, 2^76820426 is an apocalyptic number.

76820426 is a deficient number, since it is larger than the sum of its proper divisors (40584538).

76820426 is a wasteful number, since it uses less digits than its factorization.

76820426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724776.

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

The square root of 76820426 is about 8764.7262364549. The cubic root of 76820426 is about 425.1011081243.

The spelling of 76820426 in words is "seventy-six million, eight hundred twenty thousand, four hundred twenty-six".