73173128 has 16 divisors (see below), whose sum is σ = 156799680. Its totient is φ = 31359888.

The previous prime is 73173109. The next prime is 73173131. The reversal of 73173128 is 82137137.

It is a super-2 number, since 2×73173128² = 10708613322608768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73173094 and 73173103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653276 + ... + 653387.

It is an arithmetic number, because the mean of its divisors is an integer number (9799980).

Almost surely, 2^73173128 is an apocalyptic number.

It is an amenable number.

73173128 is an abundant number, since it is smaller than the sum of its proper divisors (83626552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73173128 is a wasteful number, since it uses less digits than its factorization.

73173128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306676 (or 1306672 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 73173128 is about 8554.1292952585. The cubic root of 73173128 is about 418.2640517779.

The spelling of 73173128 in words is "seventy-three million, one hundred seventy-three thousand, one hundred twenty-eight".