91142284 has 24 divisors (see below), whose sum is σ = 170311680. Its totient is φ = 42574224.

The previous prime is 91142281. The next prime is 91142291. The reversal of 91142284 is 48224119.

It is a super-3 number, since 3×91142284³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91142281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7564 + ... + 15475.

It is an arithmetic number, because the mean of its divisors is an integer number (7096320).

Almost surely, 2^91142284 is an apocalyptic number.

It is an amenable number.

91142284 is a deficient number, since it is larger than the sum of its proper divisors (79169396).

91142284 is a wasteful number, since it uses less digits than its factorization.

91142284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23109 (or 23107 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 91142284 is about 9546.8468092873. The cubic root of 91142284 is about 450.0284492302.

The spelling of 91142284 in words is "ninety-one million, one hundred forty-two thousand, two hundred eighty-four".