87273138 has 16 divisors (see below), whose sum is σ = 184813920. Its totient is φ = 27379776.

The previous prime is 87273113. The next prime is 87273149. The reversal of 87273138 is 83137278.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87273096 and 87273105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427708 + ... + 427911.

It is an arithmetic number, because the mean of its divisors is an integer number (11550870).

Almost surely, 2^87273138 is an apocalyptic number.

87273138 is an abundant number, since it is smaller than the sum of its proper divisors (97540782).

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

87273138 is a wasteful number, since it uses less digits than its factorization.

87273138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855641.

The product of its digits is 56448, while the sum is 39.

The square root of 87273138 is about 9342.0093127763. The cubic root of 87273138 is about 443.5679894173.

The spelling of 87273138 in words is "eighty-seven million, two hundred seventy-three thousand, one hundred thirty-eight".