84723640 has 16 divisors (see below), whose sum is σ = 190628280. Its totient is φ = 33889440.

The previous prime is 84723623. The next prime is 84723643. The reversal of 84723640 is 4632748.

It is a junction number, because it is equal to n+sod(n) for n = 84723596 and 84723605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84723643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059006 + ... + 1059085.

Almost surely, 2^84723640 is an apocalyptic number.

It is an amenable number.

84723640 is an abundant number, since it is smaller than the sum of its proper divisors (105904640).

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

84723640 is a wasteful number, since it uses less digits than its factorization.

84723640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118102 (or 2118098 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 84723640 is about 9204.5445297418. The cubic root of 84723640 is about 439.2059369715.

The spelling of 84723640 in words is "eighty-four million, seven hundred twenty-three thousand, six hundred forty".