83885550 has 144 divisors (see below), whose sum is σ = 246560112. Its totient is φ = 18816000.

The previous prime is 83885537. The next prime is 83885567. The reversal of 83885550 is 5558838.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 742294 + ... + 742406.

It is an arithmetic number, because the mean of its divisors is an integer number (1712223).

Almost surely, 2^83885550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83885550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123280056).

83885550 is an abundant number, since it is smaller than the sum of its proper divisors (162674562).

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

83885550 is a wasteful number, since it uses less digits than its factorization.

83885550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The square root of 83885550 is about 9158.9055022967. The cubic root of 83885550 is about 437.7529204242.

The spelling of 83885550 in words is "eighty-three million, eight hundred eighty-five thousand, five hundred fifty".