84297040 has 20 divisors (see below), whose sum is σ = 195990804. Its totient is φ = 33718784.

The previous prime is 84297019. The next prime is 84297043. The reversal of 84297040 is 4079248.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10061584 + 74235456 = 3172^2 + 8616^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 84296987 and 84297005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84297043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526777 + ... + 526936.

Almost surely, 2^84297040 is an apocalyptic number.

84297040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84297040 is an abundant number, since it is smaller than the sum of its proper divisors (111693764).

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

84297040 is a wasteful number, since it uses less digits than its factorization.

84297040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053726 (or 1053720 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 84297040 is about 9181.3419498459. The cubic root of 84297040 is about 438.4675338180.

The spelling of 84297040 in words is "eighty-four million, two hundred ninety-seven thousand, forty".