921452994 has 144 divisors (see below), whose sum is σ = 2640805440. Its totient is φ = 226670400.

The previous prime is 921452971. The next prime is 921452999. The reversal of 921452994 is 499254129.

It is not an unprimeable number, because it can be changed into a prime (921452999) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 288084 + ... + 291264.

Almost surely, 2^921452994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921452994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320402720).

921452994 is an abundant number, since it is smaller than the sum of its proper divisors (1719352446).

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

921452994 is a wasteful number, since it uses less digits than its factorization.

921452994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3237 (or 3223 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 921452994 is about 30355.4442234008. Note that the first 3 decimals coincide. The cubic root of 921452994 is about 973.1005734739.

The spelling of 921452994 in words is "nine hundred twenty-one million, four hundred fifty-two thousand, nine hundred ninety-four".