994971640 has 32 divisors (see below), whose sum is σ = 2410894080. Its totient is φ = 367373952.

The previous prime is 994971619. The next prime is 994971709. The reversal of 994971640 is 46179499.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956184 + ... + 957223.

It is an arithmetic number, because the mean of its divisors is an integer number (75340440).

Almost surely, 2^994971640 is an apocalyptic number.

It is an amenable number.

994971640 is an abundant number, since it is smaller than the sum of its proper divisors (1415922440).

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

994971640 is a wasteful number, since it uses less digits than its factorization.

994971640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913431 (or 1913427 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 994971640 is about 31543.1710517506. The cubic root of 994971640 is about 998.3210627472.

The spelling of 994971640 in words is "nine hundred ninety-four million, nine hundred seventy-one thousand, six hundred forty".