994540140 has 288 divisors, whose sum is σ = 3517839360. Its totient is φ = 232848000.

The previous prime is 994540139. The next prime is 994540147. The reversal of 994540140 is 41045499.

It is a happy number.

It is a super-2 number, since 2×994540140² = 1978220180142439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 994540095 and 994540104.

It is not an unprimeable number, because it can be changed into a prime (994540147) 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, 2025295 + ... + 2025785.

It is an arithmetic number, because the mean of its divisors is an integer number (12214720).

Almost surely, 2^994540140 is an apocalyptic number.

994540140 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 994540140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758919680).

994540140 is an abundant number, since it is smaller than the sum of its proper divisors (2523299220).

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

994540140 is a wasteful number, since it uses less digits than its factorization.

994540140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 994540140 is about 31536.3304777205. The cubic root of 994540140 is about 998.1767243530.

The spelling of 994540140 in words is "nine hundred ninety-four million, five hundred forty thousand, one hundred forty".