91630938 has 16 divisors (see below), whose sum is σ = 209442240. Its totient is φ = 26180256.

The previous prime is 91630933. The next prime is 91630991. The reversal of 91630938 is 83903619.

It is a junction number, because it is equal to n+sod(n) for n = 91630896 and 91630905.

It is not an unprimeable number, because it can be changed into a prime (91630933) 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, 1090803 + ... + 1090886.

It is an arithmetic number, because the mean of its divisors is an integer number (13090140).

Almost surely, 2^91630938 is an apocalyptic number.

91630938 is an abundant number, since it is smaller than the sum of its proper divisors (117811302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91630938 is a wasteful number, since it uses less digits than its factorization.

91630938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181701.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 91630938 is about 9572.4050269512. The cubic root of 91630938 is about 450.8312831814.

The spelling of 91630938 in words is "ninety-one million, six hundred thirty thousand, nine hundred thirty-eight".