991452000 has 768 divisors, whose sum is σ = 4302305280. Its totient is φ = 193536000.

The previous prime is 991451999. The next prime is 991452061. The reversal of 991452000 is 254199.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26795982 + ... + 26796018.

It is an arithmetic number, because the mean of its divisors is an integer number (5601960).

Almost surely, 2^991452000 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 991452000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2151152640).

991452000 is an abundant number, since it is smaller than the sum of its proper divisors (3310853280).

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

991452000 is a wasteful number, since it uses less digits than its factorization.

991452000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 991452000 is about 31487.3307855715. The cubic root of 991452000 is about 997.1425091903.

The spelling of 991452000 in words is "nine hundred ninety-one million, four hundred fifty-two thousand".