91028954 has 16 divisors (see below), whose sum is σ = 140521416. Its totient is φ = 44193600.

The previous prime is 91028939. The next prime is 91028957. The reversal of 91028954 is 45982019.

It can be written as a sum of positive squares in 4 ways, for example, as 78234025 + 12794929 = 8845^2 + 3577^2 .

It is not an unprimeable number, because it can be changed into a prime (91028957) 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, 47984 + ... + 49844.

Almost surely, 2^91028954 is an apocalyptic number.

91028954 is a deficient number, since it is larger than the sum of its proper divisors (49492462).

91028954 is a wasteful number, since it uses less digits than its factorization.

91028954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 91028954 is about 9540.9094954307. The cubic root of 91028954 is about 449.8418440098.

The spelling of 91028954 in words is "ninety-one million, twenty-eight thousand, nine hundred fifty-four".