87277720 has 32 divisors (see below), whose sum is σ = 197179920. Its totient is φ = 34768000.

The previous prime is 87277703. The next prime is 87277727. The reversal of 87277720 is 2777278.

It is a super-4 number, since 4×87277720⁴ (a number of 33 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87277727) by changing a digit.

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, 5694 + ... + 14386.

Almost surely, 2^87277720 is an apocalyptic number.

It is an amenable number.

87277720 is an abundant number, since it is smaller than the sum of its proper divisors (109902200).

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

87277720 is a wasteful number, since it uses less digits than its factorization.

87277720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8955 (or 8951 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 40.

The square root of 87277720 is about 9342.2545458792. The cubic root of 87277720 is about 443.5757519927.

The spelling of 87277720 in words is "eighty-seven million, two hundred seventy-seven thousand, seven hundred twenty".