73569840 has 40 divisors (see below), whose sum is σ = 228067248. Its totient is φ = 19618560.

The previous prime is 73569833. The next prime is 73569841. The reversal of 73569840 is 4896537.

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 = 73569792 and 73569801.

It is not an unprimeable number, because it can be changed into a prime (73569841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153031 + ... + 153510.

Almost surely, 2^73569840 is an apocalyptic number.

It is an amenable number.

73569840 is an abundant number, since it is smaller than the sum of its proper divisors (154497408).

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

73569840 is a wasteful number, since it uses less digits than its factorization.

73569840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306557 (or 306551 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 73569840 is about 8577.2862841344. The cubic root of 73569840 is about 419.0185701200.

The spelling of 73569840 in words is "seventy-three million, five hundred sixty-nine thousand, eight hundred forty".