73720430 has 32 divisors (see below), whose sum is σ = 153584640. Its totient is φ = 24953760.

The previous prime is 73720429. The next prime is 73720453. The reversal of 73720430 is 3402737.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73720430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136 + ... + 12195.

It is an arithmetic number, because the mean of its divisors is an integer number (4799520).

Almost surely, 2^73720430 is an apocalyptic number.

73720430 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

73720430 is an abundant number, since it is smaller than the sum of its proper divisors (79864210).

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

73720430 is a wasteful number, since it uses less digits than its factorization.

73720430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13424.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 73720430 is about 8586.0602140912. The cubic root of 73720430 is about 419.3042714448.

The spelling of 73720430 in words is "seventy-three million, seven hundred twenty thousand, four hundred thirty".