87772656 has 80 divisors (see below), whose sum is σ = 238143488. Its totient is φ = 27820800.

The previous prime is 87772591. The next prime is 87772673. The reversal of 87772656 is 65627778.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90285 + ... + 91251.

Almost surely, 2^87772656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87772656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119071744).

87772656 is an abundant number, since it is smaller than the sum of its proper divisors (150370832).

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

87772656 is a wasteful number, since it uses less digits than its factorization.

87772656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 1064 counting only the distinct ones).

The product of its digits is 987840, while the sum is 48.

The square root of 87772656 is about 9368.7062073693. The cubic root of 87772656 is about 444.4126510220.

The spelling of 87772656 in words is "eighty-seven million, seven hundred seventy-two thousand, six hundred fifty-six".