73138530 has 16 divisors (see below), whose sum is σ = 175532544. Its totient is φ = 19503600.

The previous prime is 73138523. The next prime is 73138537. The reversal of 73138530 is 3583137.

It is an interprime number because it is at equal distance from previous prime (73138523) and next prime (73138537).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2437951 = 73138530 / (7 + 3 + 1 + 3 + 8 + 5 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (73138537) 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, 1218946 + ... + 1219005.

It is an arithmetic number, because the mean of its divisors is an integer number (10970784).

Almost surely, 2^73138530 is an apocalyptic number.

73138530 is an abundant number, since it is smaller than the sum of its proper divisors (102394014).

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

73138530 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 73138530 = (38315073)₁₁.

73138530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437961.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 73138530 is about 8552.1067579866. The cubic root of 73138530 is about 418.1981196458.

The spelling of 73138530 in words is "seventy-three million, one hundred thirty-eight thousand, five hundred thirty".