994581900 has 216 divisors, whose sum is σ = 3383845920. Its totient is φ = 244333440.

The previous prime is 994581877. The next prime is 994581919. The reversal of 994581900 is 9185499.

994581900 is a `hidden beast` number, since 9 + 9 + 458 + 190 + 0 = 666.

It is a super-2 number, since 2×994581900² = 1978386311615220000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1977049 + ... + 1977551.

Almost surely, 2^994581900 is an apocalyptic number.

994581900 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 994581900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1691922960).

994581900 is an abundant number, since it is smaller than the sum of its proper divisors (2389264020).

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

994581900 is a wasteful number, since it uses less digits than its factorization.

994581900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 994581900 is about 31536.9925642887. The cubic root of 994581900 is about 998.1906950566.

The spelling of 994581900 in words is "nine hundred ninety-four million, five hundred eighty-one thousand, nine hundred".