87781010 has 8 divisors (see below), whose sum is σ = 158005836. Its totient is φ = 35112400.

The previous prime is 87780997. The next prime is 87781039. The reversal of 87781010 is 1018778.

It can be written as a sum of positive squares in 2 ways, for example, as 79584241 + 8196769 = 8921^2 + 2863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4389041 + ... + 4389060.

Almost surely, 2^87781010 is an apocalyptic number.

87781010 is a deficient number, since it is larger than the sum of its proper divisors (70224826).

87781010 is a wasteful number, since it uses less digits than its factorization.

87781010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8778108.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 87781010 is about 9369.1520427411. The cubic root of 87781010 is about 444.4267499668.

Adding to 87781010 its reverse (1018778), we get a palindrome (88799788).

The spelling of 87781010 in words is "eighty-seven million, seven hundred eighty-one thousand, ten".