84398420 has 24 divisors (see below), whose sum is σ = 177666048. Its totient is φ = 33677600.

The previous prime is 84398411. The next prime is 84398423. The reversal of 84398420 is 2489348.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84398423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3725 + ... + 13515.

It is an arithmetic number, because the mean of its divisors is an integer number (7402752).

Almost surely, 2^84398420 is an apocalyptic number.

It is an amenable number.

84398420 is an abundant number, since it is smaller than the sum of its proper divisors (93267628).

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

84398420 is a wasteful number, since it uses less digits than its factorization.

84398420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10231 (or 10229 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 84398420 is about 9186.8612703143. The cubic root of 84398420 is about 438.6432380121.

The spelling of 84398420 in words is "eighty-four million, three hundred ninety-eight thousand, four hundred twenty".