45991232 has 56 divisors (see below), whose sum is σ = 104973120. Its totient is φ = 19584000.

The previous prime is 45991223. The next prime is 45991243. The reversal of 45991232 is 23219954.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×45991232³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45991192 and 45991201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112244 + ... + 112652.

It is an arithmetic number, because the mean of its divisors is an integer number (1874520).

Almost surely, 2^45991232 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 45991232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52486560).

45991232 is an abundant number, since it is smaller than the sum of its proper divisors (58981888).

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

45991232 is a wasteful number, since it uses less digits than its factorization.

45991232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 669 counting only the distinct ones).

The product of its digits is 19440, while the sum is 35.

The square root of 45991232 is about 6781.6835667849. The cubic root of 45991232 is about 358.2820203190.

The spelling of 45991232 in words is "forty-five million, nine hundred ninety-one thousand, two hundred thirty-two".