87791242 has 24 divisors (see below), whose sum is σ = 167114880. Its totient is φ = 34203960.

The previous prime is 87791219. The next prime is 87791273. The reversal of 87791242 is 24219778.

It is a junction number, because it is equal to n+sod(n) for n = 87791195 and 87791204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39642 + ... + 41797.

It is an arithmetic number, because the mean of its divisors is an integer number (6963120).

Almost surely, 2^87791242 is an apocalyptic number.

87791242 is a deficient number, since it is larger than the sum of its proper divisors (79323638).

87791242 is a wasteful number, since it uses less digits than its factorization.

87791242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81466 (or 81459 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 87791242 is about 9369.6980741110. The cubic root of 87791242 is about 444.4440171709. Note that the first 3 decimals are identical.

The spelling of 87791242 in words is "eighty-seven million, seven hundred ninety-one thousand, two hundred forty-two".