91400444 has 6 divisors (see below), whose sum is σ = 159950784. Its totient is φ = 45700220.

The previous prime is 91400417. The next prime is 91400447. The reversal of 91400444 is 44400419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91400447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11425052 + ... + 11425059.

It is an arithmetic number, because the mean of its divisors is an integer number (26658464).

Almost surely, 2^91400444 is an apocalyptic number.

It is an amenable number.

91400444 is a deficient number, since it is larger than the sum of its proper divisors (68550340).

91400444 is a wasteful number, since it uses less digits than its factorization.

91400444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22850115 (or 22850113 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 91400444 is about 9560.3579430898. The cubic root of 91400444 is about 450.4529496896.

The spelling of 91400444 in words is "ninety-one million, four hundred thousand, four hundred forty-four".