84209340 has 24 divisors (see below), whose sum is σ = 235786320. Its totient is φ = 22455808.

The previous prime is 84209309. The next prime is 84209353. The reversal of 84209340 is 4390248.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 84209298 and 84209307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701685 + ... + 701804.

It is an arithmetic number, because the mean of its divisors is an integer number (9824430).

Almost surely, 2^84209340 is an apocalyptic number.

It is an amenable number.

84209340 is an abundant number, since it is smaller than the sum of its proper divisors (151576980).

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

84209340 is a wasteful number, since it uses less digits than its factorization.

84209340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403501 (or 1403499 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 84209340 is about 9176.5647167118. The cubic root of 84209340 is about 438.3154250934.

Adding to 84209340 its reverse (4390248), we get a palindrome (88599588).

The spelling of 84209340 in words is "eighty-four million, two hundred nine thousand, three hundred forty".