87073820 has 12 divisors (see below), whose sum is σ = 182855064. Its totient is φ = 34829520.

The previous prime is 87073807. The next prime is 87073829. The reversal of 87073820 is 2837078.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87073829) 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, 2176826 + ... + 2176865.

It is an arithmetic number, because the mean of its divisors is an integer number (15237922).

Almost surely, 2^87073820 is an apocalyptic number.

It is an amenable number.

87073820 is an abundant number, since it is smaller than the sum of its proper divisors (95781244).

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

87073820 is a wasteful number, since it uses less digits than its factorization.

87073820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4353700 (or 4353698 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 87073820 is about 9331.3353813910. The cubic root of 87073820 is about 443.2300523853.

The spelling of 87073820 in words is "eighty-seven million, seventy-three thousand, eight hundred twenty".