87742722 has 16 divisors (see below), whose sum is σ = 184721760. Its totient is φ = 27708192.

The previous prime is 87742691. The next prime is 87742751. The reversal of 87742722 is 22724778.

It is a happy 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, 384723 + ... + 384950.

It is an arithmetic number, because the mean of its divisors is an integer number (11545110).

Almost surely, 2^87742722 is an apocalyptic number.

87742722 is an abundant number, since it is smaller than the sum of its proper divisors (96979038).

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

87742722 is a wasteful number, since it uses less digits than its factorization.

87742722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769697.

The product of its digits is 87808, while the sum is 39.

The square root of 87742722 is about 9367.1085186412. The cubic root of 87742722 is about 444.3621244249.

The spelling of 87742722 in words is "eighty-seven million, seven hundred forty-two thousand, seven hundred twenty-two".