87120782 has 16 divisors (see below), whose sum is σ = 150831072. Its totient is φ = 36967200.

The previous prime is 87120773. The next prime is 87120827. The reversal of 87120782 is 28702178.

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, 29393 + ... + 32220.

It is an arithmetic number, because the mean of its divisors is an integer number (9426942).

Almost surely, 2^87120782 is an apocalyptic number.

87120782 is a deficient number, since it is larger than the sum of its proper divisors (63710290).

87120782 is a wasteful number, since it uses less digits than its factorization.

87120782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61723.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 87120782 is about 9333.8514022883. The cubic root of 87120782 is about 443.3097212944.

The spelling of 87120782 in words is "eighty-seven million, one hundred twenty thousand, seven hundred eighty-two".