91146428 has 12 divisors (see below), whose sum is σ = 159655440. Its totient is φ = 45530592.

The previous prime is 91146421. The next prime is 91146437. The reversal of 91146428 is 82464119.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91146421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5576 + ... + 14607.

It is an arithmetic number, because the mean of its divisors is an integer number (13304620).

Almost surely, 2^91146428 is an apocalyptic number.

It is an amenable number.

91146428 is a deficient number, since it is larger than the sum of its proper divisors (68509012).

91146428 is a wasteful number, since it uses less digits than its factorization.

91146428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21316 (or 21314 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 91146428 is about 9547.0638418312. The cubic root of 91146428 is about 450.0352696636.

The spelling of 91146428 in words is "ninety-one million, one hundred forty-six thousand, four hundred twenty-eight".