73215990 has 24 divisors (see below), whose sum is σ = 190361808. Its totient is φ = 19524240.

The previous prime is 73215983. The next prime is 73215997. The reversal of 73215990 is 9951237.

It is an interprime number because it is at equal distance from previous prime (73215983) and next prime (73215997).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73215997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406666 + ... + 406845.

It is an arithmetic number, because the mean of its divisors is an integer number (7931742).

Almost surely, 2^73215990 is an apocalyptic number.

73215990 is an abundant number, since it is smaller than the sum of its proper divisors (117145818).

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

73215990 is a wasteful number, since it uses less digits than its factorization.

73215990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813524 (or 813521 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 73215990 is about 8556.6342682155. The cubic root of 73215990 is about 418.3457034943.

The spelling of 73215990 in words is "seventy-three million, two hundred fifteen thousand, nine hundred ninety".