994472640 has 672 divisors, whose sum is σ = 4273905600. Its totient is φ = 219469824.

The previous prime is 994472639. The next prime is 994472641. The reversal of 994472640 is 46274499.

It is an interprime number because it is at equal distance from previous prime (994472639) and next prime (994472641).

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (994472641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34292146 + ... + 34292174.

Almost surely, 2^994472640 is an apocalyptic number.

994472640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 994472640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136952800).

994472640 is an abundant number, since it is smaller than the sum of its proper divisors (3279432960).

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

994472640 is an equidigital number, since it uses as much as digits as its factorization.

994472640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 994472640 is about 31535.2602652967. The cubic root of 994472640 is about 998.1541415697.

The spelling of 994472640 in words is "nine hundred ninety-four million, four hundred seventy-two thousand, six hundred forty".