999955450 has 24 divisors (see below), whose sum is σ = 2002988988. Its totient is φ = 369214080.

The previous prime is 999955433. The next prime is 999955457. The reversal of 999955450 is 54559999.

It can be written as a sum of positive squares in 6 ways, for example, as 189585361 + 810370089 = 13769^2 + 28467^2 .

It is a junction number, because it is equal to n+sod(n) for n = 999955391 and 999955400.

It is not an unprimeable number, because it can be changed into a prime (999955457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 768547 + ... + 769846.

Almost surely, 2^999955450 is an apocalyptic number.

999955450 is an abundant number, since it is smaller than the sum of its proper divisors (1003033538).

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

999955450 is a wasteful number, since it uses less digits than its factorization.

999955450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538418 (or 1538413 counting only the distinct ones).

The product of its (nonzero) digits is 3280500, while the sum is 55.

The square root of 999955450 is about 31622.0721964896. The cubic root of 999955450 is about 999.9851497795.

It can be divided in two parts, 999955 and 450, that added together give a triangular number (1000405 = T₁₄₁₄).

The spelling of 999955450 in words is "nine hundred ninety-nine million, nine hundred fifty-five thousand, four hundred fifty".