84400050 has 72 divisors (see below), whose sum is σ = 243506736. Its totient is φ = 19289760.

The previous prime is 84400049. The next prime is 84400051. The reversal of 84400050 is 5000448.

It is an interprime number because it is at equal distance from previous prime (84400049) and next prime (84400051).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (84400051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1609 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (3382038).

Almost surely, 2^84400050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84400050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121753368).

84400050 is an abundant number, since it is smaller than the sum of its proper divisors (159106686).

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

84400050 is a wasteful number, since it uses less digits than its factorization.

84400050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11512 (or 11500 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 84400050 is about 9186.9499835364. The cubic root of 84400050 is about 438.6460618560.

Adding to 84400050 its reverse (5000448), we get a palindrome (89400498).

The spelling of 84400050 in words is "eighty-four million, four hundred thousand, fifty".