73890236 has 36 divisors (see below), whose sum is σ = 155284416. Its totient is φ = 30643200.

The previous prime is 73890233. The next prime is 73890239. The reversal of 73890236 is 63209837.

It is an interprime number because it is at equal distance from previous prime (73890233) and next prime (73890239).

It is a super-2 number, since 2×73890236² = 10919533952271392, which contains 22 as substring.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 73890236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73890233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (4313456).

Almost surely, 2^73890236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73890236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77642208).

73890236 is an abundant number, since it is smaller than the sum of its proper divisors (81394180).

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

73890236 is a wasteful number, since it uses less digits than its factorization.

73890236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12210 (or 12201 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 73890236 is about 8595.9429965537. The cubic root of 73890236 is about 419.6259632917.

The spelling of 73890236 in words is "seventy-three million, eight hundred ninety thousand, two hundred thirty-six".