91625430 has 64 divisors (see below), whose sum is σ = 238049280. Its totient is φ = 22436736.

The previous prime is 91625377. The next prime is 91625437. The reversal of 91625430 is 3452619.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91625437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92719 + ... + 93701.

It is an arithmetic number, because the mean of its divisors is an integer number (3719520).

Almost surely, 2^91625430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91625430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119024640).

91625430 is an abundant number, since it is smaller than the sum of its proper divisors (146423850).

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

91625430 is a wasteful number, since it uses less digits than its factorization.

91625430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 91625430 is about 9572.1173206350. The cubic root of 91625430 is about 450.8222497388.

It can be divided in two parts, 91 and 625430, that added together give a triangular number (625521 = T₁₁₁₈).

The spelling of 91625430 in words is "ninety-one million, six hundred twenty-five thousand, four hundred thirty".