73136428 has 6 divisors (see below), whose sum is σ = 127988756. Its totient is φ = 36568212.

The previous prime is 73136419. The next prime is 73136443. The reversal of 73136428 is 82463137.

It is a happy number.

It is a super-4 number, since 4×73136428⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73136393 and 73136402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9142050 + ... + 9142057.

Almost surely, 2^73136428 is an apocalyptic number.

It is an amenable number.

73136428 is a deficient number, since it is larger than the sum of its proper divisors (54852328).

73136428 is a wasteful number, since it uses less digits than its factorization.

73136428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18284111 (or 18284109 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 73136428 is about 8551.9838634085. The cubic root of 73136428 is about 418.1941132720.

The spelling of 73136428 in words is "seventy-three million, one hundred thirty-six thousand, four hundred twenty-eight".