84711640 has 32 divisors (see below), whose sum is σ = 205264080. Its totient is φ = 31277952.

The previous prime is 84711637. The next prime is 84711661. The reversal of 84711640 is 4611748.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80934 + ... + 81973.

Almost surely, 2^84711640 is an apocalyptic number.

It is an amenable number.

84711640 is an abundant number, since it is smaller than the sum of its proper divisors (120552440).

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

84711640 is a wasteful number, since it uses less digits than its factorization.

84711640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162931 (or 162927 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 84711640 is about 9203.8926547413. The cubic root of 84711640 is about 439.1852000591.

The spelling of 84711640 in words is "eighty-four million, seven hundred eleven thousand, six hundred forty".