87728948 has 6 divisors (see below), whose sum is σ = 153525666. Its totient is φ = 43864472.

The previous prime is 87728899. The next prime is 87728981. The reversal of 87728948 is 84982778.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86341264 + 1387684 = 9292^2 + 1178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87728948.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10966115 + ... + 10966122.

It is an arithmetic number, because the mean of its divisors is an integer number (25587611).

Almost surely, 2^87728948 is an apocalyptic number.

It is an amenable number.

87728948 is a deficient number, since it is larger than the sum of its proper divisors (65796718).

87728948 is a wasteful number, since it uses less digits than its factorization.

87728948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21932241 (or 21932239 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 53.

The square root of 87728948 is about 9366.3732575635. The cubic root of 87728948 is about 444.3388709703.

The spelling of 87728948 in words is "eighty-seven million, seven hundred twenty-eight thousand, nine hundred forty-eight".