91407852 has 78 divisors (see below), whose sum is σ = 245525588. Its totient is φ = 29760696.

The previous prime is 91407851. The next prime is 91407857. The reversal of 91407852 is 25870419.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (91407851) by changing a digit.

It is a polite number, since it can be written in 25 ways as a sum of consecutive naturals, for example, 2125743 + ... + 2125785.

Almost surely, 2^91407852 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 91407852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122762794).

91407852 is an abundant number, since it is smaller than the sum of its proper divisors (154117736).

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

91407852 is an frugal number, since it uses more digits than its factorization.

91407852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 91407852 is about 9560.7453684323. The cubic root of 91407852 is about 450.4651190882.

The spelling of 91407852 in words is "ninety-one million, four hundred seven thousand, eight hundred fifty-two".