84040440 has 64 divisors (see below), whose sum is σ = 275045760. Its totient is φ = 20373120.

The previous prime is 84040433. The next prime is 84040471. The reversal of 84040440 is 4404048.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 84040440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30514 + ... + 33153.

It is an arithmetic number, because the mean of its divisors is an integer number (4297590).

Almost surely, 2^84040440 is an apocalyptic number.

It is an amenable number.

84040440 is an abundant number, since it is smaller than the sum of its proper divisors (191005320).

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

84040440 is a wasteful number, since it uses less digits than its factorization.

84040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63692 (or 63688 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 84040440 is about 9167.3573073160. The cubic root of 84040440 is about 438.0221835682.

Adding to 84040440 its reverse (4404048), we get a palindrome (88444488).

The spelling of 84040440 in words is "eighty-four million, forty thousand, four hundred forty".