999420084036 has 864 divisors, whose sum is σ = 3227780634624. Its totient is φ = 268719897600.

The previous prime is 999420084031. The next prime is 999420084037. The reversal of 999420084036 is 630480024999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (999420084031) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 4736587971 + ... + 4736588181.

It is an arithmetic number, because the mean of its divisors is an integer number (3735857216).

Almost surely, 2^999420084036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999420084036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1613890317312).

999420084036 is an abundant number, since it is smaller than the sum of its proper divisors (2228360550588).

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

999420084036 is a wasteful number, since it uses less digits than its factorization.

999420084036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 999420084036 in words is "nine hundred ninety-nine billion, four hundred twenty million, eighty-four thousand, thirty-six".