84321420 has 96 divisors (see below), whose sum is σ = 244532736. Its totient is φ = 21696000.

The previous prime is 84321407. The next prime is 84321437. The reversal of 84321420 is 2412348.

It is a super-2 number, since 2×84321420² = 14220203741632800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371347 + ... + 371573.

It is an arithmetic number, because the mean of its divisors is an integer number (2547216).

Almost surely, 2^84321420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84321420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122266368).

84321420 is an abundant number, since it is smaller than the sum of its proper divisors (160211316).

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

84321420 is a wasteful number, since it uses less digits than its factorization.

84321420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 84321420 is about 9182.6695464881. The cubic root of 84321420 is about 438.5098002609.

Adding to 84321420 its reverse (2412348), we get a palindrome (86733768).

The spelling of 84321420 in words is "eighty-four million, three hundred twenty-one thousand, four hundred twenty".