291142088 has 16 divisors (see below), whose sum is σ = 552469680. Its totient is φ = 143816848.

The previous prime is 291142079. The next prime is 291142109. The reversal of 291142088 is 880241192.

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, 218570 + ... + 219897.

It is an arithmetic number, because the mean of its divisors is an integer number (34529355).

Almost surely, 2^291142088 is an apocalyptic number.

It is an amenable number.

291142088 is a deficient number, since it is larger than the sum of its proper divisors (261327592).

291142088 is a wasteful number, since it uses less digits than its factorization.

291142088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438556 (or 438552 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 291142088 is about 17062.8862740159. The cubic root of 291142088 is about 662.7783763316.

The spelling of 291142088 in words is "two hundred ninety-one million, one hundred forty-two thousand, eighty-eight".