76404139 has 8 divisors (see below), whose sum is σ = 88424960. Its totient is φ = 64659816.

The previous prime is 76404109. The next prime is 76404151. The reversal of 76404139 is 93140467.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 76404139 - 2¹⁹ = 75879851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76404109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68529 + ... + 69634.

It is an arithmetic number, because the mean of its divisors is an integer number (11053120).

Almost surely, 2^76404139 is an apocalyptic number.

76404139 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

76404139 is a deficient number, since it is larger than the sum of its proper divisors (12020821).

76404139 is a wasteful number, since it uses less digits than its factorization.

76404139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138249.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 76404139 is about 8740.9461158389. The cubic root of 76404139 is about 424.3318479421.

The spelling of 76404139 in words is "seventy-six million, four hundred four thousand, one hundred thirty-nine".