84400844 has 24 divisors (see below), whose sum is σ = 161910336. Its totient is φ = 38178000.

The previous prime is 84400819. The next prime is 84400847. The reversal of 84400844 is 44800448.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 84400844.

It is not an unprimeable number, because it can be changed into a prime (84400847) 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, 4739 + ... + 13829.

It is an arithmetic number, because the mean of its divisors is an integer number (6746264).

Almost surely, 2^84400844 is an apocalyptic number.

It is an amenable number.

84400844 is a deficient number, since it is larger than the sum of its proper divisors (77509492).

84400844 is a wasteful number, since it uses less digits than its factorization.

84400844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9317 (or 9315 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 84400844 is about 9186.9931969062. The cubic root of 84400844 is about 438.6474373839.

It can be divided in two parts, 84400 and 844, that multiplied together give a square (71233600 = 8440²).

The spelling of 84400844 in words is "eighty-four million, four hundred thousand, eight hundred forty-four".