991254000 has 320 divisors, whose sum is σ = 3643481088. Its totient is φ = 229504000.

The previous prime is 991253999. The next prime is 991254029. The reversal of 991254000 is 452199.

It is a happy number.

It is a super-3 number, since 3×991254000³ (a number of 28 digits) contains 333 as substring.

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 63 ways as a sum of consecutive naturals, for example, 1517674 + ... + 1518326.

Almost surely, 2^991254000 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 991254000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1821740544).

991254000 is an abundant number, since it is smaller than the sum of its proper divisors (2652227088).

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

991254000 is a wasteful number, since it uses less digits than its factorization.

991254000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 697 counting only the distinct ones).

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

The square root of 991254000 is about 31484.1865068799. The cubic root of 991254000 is about 997.0761259594.

The spelling of 991254000 in words is "nine hundred ninety-one million, two hundred fifty-four thousand".