91470648 has 64 divisors (see below), whose sum is σ = 236597760. Its totient is φ = 29451776.

The previous prime is 91470647. The next prime is 91470671. The reversal of 91470648 is 84607419.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91470641) 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, 93136 + ... + 94112.

It is an arithmetic number, because the mean of its divisors is an integer number (3696840).

Almost surely, 2^91470648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91470648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118298880).

91470648 is an abundant number, since it is smaller than the sum of its proper divisors (145127112).

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

91470648 is a wasteful number, since it uses less digits than its factorization.

91470648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 91470648 is about 9564.0288581748. The cubic root of 91470648 is about 450.5682500257.

The spelling of 91470648 in words is "ninety-one million, four hundred seventy thousand, six hundred forty-eight".