73428641 has 12 divisors (see below), whose sum is σ = 86742000. Its totient is φ = 61616880.

The previous prime is 73428637. The next prime is 73428653. The reversal of 73428641 is 14682437.

It is not a de Polignac number, because 73428641 - 2² = 73428637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73428601) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 17891 + ... + 21608.

It is an arithmetic number, because the mean of its divisors is an integer number (7228500).

Almost surely, 2^73428641 is an apocalyptic number.

It is an amenable number.

73428641 is a deficient number, since it is larger than the sum of its proper divisors (13313359).

73428641 is a wasteful number, since it uses less digits than its factorization.

73428641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39536 (or 39523 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 73428641 is about 8569.0513477281. The cubic root of 73428641 is about 418.7503311500.

The spelling of 73428641 in words is "seventy-three million, four hundred twenty-eight thousand, six hundred forty-one".