87777722 has 32 divisors (see below), whose sum is σ = 140356800. Its totient is φ = 41106688.

The previous prime is 87777721. The next prime is 87777757. The reversal of 87777722 is 22777778.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87777721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386573 + ... + 386799.

It is an arithmetic number, because the mean of its divisors is an integer number (4386150).

Almost surely, 2^87777722 is an apocalyptic number.

87777722 is a deficient number, since it is larger than the sum of its proper divisors (52579078).

87777722 is a wasteful number, since it uses less digits than its factorization.

87777722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its digits is 537824, while the sum is 47.

The square root of 87777722 is about 9368.9765716432. The cubic root of 87777722 is about 444.4212009557.

The spelling of 87777722 in words is "eighty-seven million, seven hundred seventy-seven thousand, seven hundred twenty-two".