73421528 has 16 divisors (see below), whose sum is σ = 138930000. Its totient is φ = 36373536.

The previous prime is 73421507. The next prime is 73421539. The reversal of 73421528 is 82512437.

It is a junction number, because it is equal to n+sod(n) for n = 73421494 and 73421503.

It is a congruent number.

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, 41228 + ... + 42971.

It is an arithmetic number, because the mean of its divisors is an integer number (8683125).

Almost surely, 2^73421528 is an apocalyptic number.

It is an amenable number.

73421528 is a deficient number, since it is larger than the sum of its proper divisors (65508472).

73421528 is a wasteful number, since it uses less digits than its factorization.

73421528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84314 (or 84310 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 73421528 is about 8568.6362975680. The cubic root of 73421528 is about 418.7368093268.

Subtracting 73421528 from its reverse (82512437), we obtain a palindrome (9090909).

The spelling of 73421528 in words is "seventy-three million, four hundred twenty-one thousand, five hundred twenty-eight".