84642062440 has 32 divisors (see below), whose sum is σ = 205094229480. Its totient is φ = 31252453632.

The previous prime is 84642062419. The next prime is 84642062443. The reversal of 84642062440 is 4426024648.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77040663844 + 7601398596 = 277562^2 + 87186^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 84642062393 and 84642062402.

It is not an unprimeable number, because it can be changed into a prime (84642062443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81386079 + ... + 81387118.

Almost surely, 2^84642062440 is an apocalyptic number.

It is an amenable number.

84642062440 is an abundant number, since it is smaller than the sum of its proper divisors (120452167040).

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

84642062440 is a wasteful number, since it uses less digits than its factorization.

84642062440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162773221 (or 162773217 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 40.

The spelling of 84642062440 in words is "eighty-four billion, six hundred forty-two million, sixty-two thousand, four hundred forty".