84512400 has 120 divisors (see below), whose sum is σ = 309426624. Its totient is φ = 19315200.

The previous prime is 84512377. The next prime is 84512411. The reversal of 84512400 is 421548.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3370 + ... + 13430.

Almost surely, 2^84512400 is an apocalyptic number.

84512400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84512400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154713312).

84512400 is an abundant number, since it is smaller than the sum of its proper divisors (224914224).

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

84512400 is a wasteful number, since it uses less digits than its factorization.

84512400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10089 (or 10078 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 84512400 is about 9193.0626017666. The cubic root of 84512400 is about 438.8406116374.

Adding to 84512400 its reverse (421548), we get a palindrome (84933948).

The spelling of 84512400 in words is "eighty-four million, five hundred twelve thousand, four hundred".