73890120 has 32 divisors (see below), whose sum is σ = 221670720. Its totient is φ = 19704000.

The previous prime is 73890101. The next prime is 73890121. The reversal of 73890120 is 2109837.

It is a happy number.

It is a super-2 number, since 2×73890120² = 10919499667228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (73890121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 307756 + ... + 307995.

It is an arithmetic number, because the mean of its divisors is an integer number (6927210).

Almost surely, 2^73890120 is an apocalyptic number.

It is an amenable number.

73890120 is an abundant number, since it is smaller than the sum of its proper divisors (147780600).

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

73890120 is a wasteful number, since it uses less digits than its factorization.

73890120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615765 (or 615761 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 73890120 is about 8595.9362491819. The cubic root of 73890120 is about 419.6257437019.

Adding to 73890120 its reverse (2109837), we get a palindrome (75999957).

The spelling of 73890120 in words is "seventy-three million, eight hundred ninety thousand, one hundred twenty".