73985886 has 120 divisors (see below), whose sum is σ = 192404520. Its totient is φ = 21065184.

The previous prime is 73985881. The next prime is 73985893. The reversal of 73985886 is 68858937.

It is a happy number.

It is a super-2 number, since 2×73985886² = 10947822654409992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (2903040) is a multiple of the sum of its prime divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73985881) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1720581 + ... + 1720623.

It is an arithmetic number, because the mean of its divisors is an integer number (1603371).

Almost surely, 2^73985886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73985886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96202260).

73985886 is an abundant number, since it is smaller than the sum of its proper divisors (118418634).

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

73985886 is a wasteful number, since it uses less digits than its factorization.

73985886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 80 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 73985886 is about 8601.5048683355. The cubic root of 73985886 is about 419.8069520978.

It can be divided in two parts, 7 and 3985886, that added together give a palindrome (3985893).

The spelling of 73985886 in words is "seventy-three million, nine hundred eighty-five thousand, eight hundred eighty-six".