84687730 has 8 divisors (see below), whose sum is σ = 152437932. Its totient is φ = 33875088.

The previous prime is 84687719. The next prime is 84687751. The reversal of 84687730 is 3778648.

It can be written as a sum of positive squares in 2 ways, for example, as 83046769 + 1640961 = 9113^2 + 1281^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×84687730² = 14344023225105800, which contains 22 as substring.

It is an unprimeable number.

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, 4234377 + ... + 4234396.

Almost surely, 2^84687730 is an apocalyptic number.

84687730 is a deficient number, since it is larger than the sum of its proper divisors (67750202).

84687730 is a wasteful number, since it uses less digits than its factorization.

84687730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468780.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 84687730 is about 9202.5936561385. The cubic root of 84687730 is about 439.1438759221.

The spelling of 84687730 in words is "eighty-four million, six hundred eighty-seven thousand, seven hundred thirty".