84344140 has 24 divisors (see below), whose sum is σ = 187542432. Its totient is φ = 31752960.

The previous prime is 84344137. The next prime is 84344153. The reversal of 84344140 is 4144348.

It is a super-2 number, since 2×84344140² = 14227867904679200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84344099 and 84344108.

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, 123696 + ... + 124375.

It is an arithmetic number, because the mean of its divisors is an integer number (7814268).

Almost surely, 2^84344140 is an apocalyptic number.

It is an amenable number.

84344140 is an abundant number, since it is smaller than the sum of its proper divisors (103198292).

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

84344140 is a wasteful number, since it uses less digits than its factorization.

84344140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248097 (or 248095 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 84344140 is about 9183.9065761799. The cubic root of 84344140 is about 438.5491815078.

Adding to 84344140 its reverse (4144348), we get a palindrome (88488488).

The spelling of 84344140 in words is "eighty-four million, three hundred forty-four thousand, one hundred forty".