84689550 has 120 divisors (see below), whose sum is σ = 256838472. Its totient is φ = 20520000.

The previous prime is 84689531. The next prime is 84689567. The reversal of 84689550 is 5598648.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 84689496 and 84689505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 43600 + ... + 45500.

Almost surely, 2^84689550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84689550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128419236).

84689550 is an abundant number, since it is smaller than the sum of its proper divisors (172148922).

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

84689550 is a wasteful number, since it uses less digits than its factorization.

84689550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 1922 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 84689550 is about 9202.6925407731. The cubic root of 84689550 is about 439.1470217384.

The spelling of 84689550 in words is "eighty-four million, six hundred eighty-nine thousand, five hundred fifty".