73554640 has 40 divisors (see below), whose sum is σ = 171774720. Its totient is φ = 29291136.

The previous prime is 73554629. The next prime is 73554647. The reversal of 73554640 is 4645537.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 73554596 and 73554605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73554647) 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 7 ways as a sum of consecutive naturals, for example, 17197 + ... + 21043.

It is an arithmetic number, because the mean of its divisors is an integer number (4294368).

Almost surely, 2^73554640 is an apocalyptic number.

It is an amenable number.

73554640 is an abundant number, since it is smaller than the sum of its proper divisors (98220080).

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

73554640 is a wasteful number, since it uses less digits than its factorization.

73554640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099 (or 4093 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 73554640 is about 8576.4001772305. The cubic root of 73554640 is about 418.9897108259.

The spelling of 73554640 in words is "seventy-three million, five hundred fifty-four thousand, six hundred forty".