76804138 has 4 divisors (see below), whose sum is σ = 115206210. Its totient is φ = 38402068.

The previous prime is 76804129. The next prime is 76804141. The reversal of 76804138 is 83140867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83140867 = 223 ⋅372829.

It can be written as a sum of positive squares in only one way, i.e., 69605649 + 7198489 = 8343^2 + 2683^2 .

It is a super-2 number, since 2×76804138² = 11797751227846088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 76804097 and 76804106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19201033 + ... + 19201036.

Almost surely, 2^76804138 is an apocalyptic number.

76804138 is a deficient number, since it is larger than the sum of its proper divisors (38402072).

76804138 is a wasteful number, since it uses less digits than its factorization.

76804138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38402071.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 76804138 is about 8763.7970081466. The cubic root of 76804138 is about 425.0710617046.

The spelling of 76804138 in words is "seventy-six million, eight hundred four thousand, one hundred thirty-eight".