87747740 has 24 divisors (see below), whose sum is σ = 185213952. Its totient is φ = 34919360.

The previous prime is 87747733. The next prime is 87747773. The reversal of 87747740 is 4774778.

It is a junction number, because it is equal to n+sod(n) for n = 87747691 and 87747700.

It is a congruent number.

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, 7196 + ... + 15075.

It is an arithmetic number, because the mean of its divisors is an integer number (7717248).

Almost surely, 2^87747740 is an apocalyptic number.

It is an amenable number.

87747740 is an abundant number, since it is smaller than the sum of its proper divisors (97466212).

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

87747740 is a wasteful number, since it uses less digits than its factorization.

87747740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22477 (or 22475 counting only the distinct ones).

The product of its (nonzero) digits is 307328, while the sum is 44.

The square root of 87747740 is about 9367.3763669450. The cubic root of 87747740 is about 444.3705952762.

The spelling of 87747740 in words is "eighty-seven million, seven hundred forty-seven thousand, seven hundred forty".