91214438 has 32 divisors (see below), whose sum is σ = 160875264. Its totient is φ = 37975392.

The previous prime is 91214437. The next prime is 91214447. The reversal of 91214438 is 83441219.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91214437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166481 + ... + 167027.

It is an arithmetic number, because the mean of its divisors is an integer number (5027352).

Almost surely, 2^91214438 is an apocalyptic number.

91214438 is a deficient number, since it is larger than the sum of its proper divisors (69660826).

91214438 is a wasteful number, since it uses less digits than its factorization.

91214438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876.

The product of its digits is 6912, while the sum is 32.

The square root of 91214438 is about 9550.6250057261. The cubic root of 91214438 is about 450.1471749057.

The spelling of 91214438 in words is "ninety-one million, two hundred fourteen thousand, four hundred thirty-eight".