84435540 has 48 divisors (see below), whose sum is σ = 270195072. Its totient is φ = 19299456.

The previous prime is 84435511. The next prime is 84435541. The reversal of 84435540 is 4553448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84435541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100099 + ... + 100938.

It is an arithmetic number, because the mean of its divisors is an integer number (5629064).

Almost surely, 2^84435540 is an apocalyptic number.

It is an amenable number.

84435540 is an abundant number, since it is smaller than the sum of its proper divisors (185759532).

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

84435540 is a wasteful number, since it uses less digits than its factorization.

84435540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201056 (or 201054 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 84435540 is about 9188.8813247315. The cubic root of 84435540 is about 438.7075364136.

Adding to 84435540 its reverse (4553448), we get a palindrome (88988988).

The spelling of 84435540 in words is "eighty-four million, four hundred thirty-five thousand, five hundred forty".