73505728 has 14 divisors (see below), whose sum is σ = 145863056. Its totient is φ = 36752832.

The previous prime is 73505711. The next prime is 73505759. The reversal of 73505728 is 82750537.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574200 + ... + 574327.

Almost surely, 2^73505728 is an apocalyptic number.

It is an amenable number.

73505728 is a deficient number, since it is larger than the sum of its proper divisors (72357328).

73505728 is a wasteful number, since it uses less digits than its factorization.

73505728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148539 (or 1148529 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 73505728 is about 8573.5481569768. The cubic root of 73505728 is about 418.8968176651.

The spelling of 73505728 in words is "seventy-three million, five hundred five thousand, seven hundred twenty-eight".