73500000 has 252 divisors, whose sum is σ = 280543284. Its totient is φ = 16800000.

The previous prime is 73499989. The next prime is 73500001. The reversal of 73500000 is 537.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73500001) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 10499997 + ... + 10500003.

It is an arithmetic number, because the mean of its divisors is an integer number (1113267).

Almost surely, 2^73500000 is an apocalyptic number.

73500000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140271642).

73500000 is an abundant number, since it is smaller than the sum of its proper divisors (207043284).

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

73500000 is an frugal number, since it uses more digits than its factorization.

73500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 15.

The square root of 73500000 is about 8573.2140997411. The cubic root of 73500000 is about 418.8859364120.

Adding to 73500000 its reverse (537), we get a palindrome (73500537).

The spelling of 73500000 in words is "seventy-three million, five hundred thousand".