999724950 has 384 divisors, whose sum is σ = 3428352000. Its totient is φ = 213373440.

The previous prime is 999724949. The next prime is 999724981. The reversal of 999724950 is 59427999.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7871787 + ... + 7871913.

It is an arithmetic number, because the mean of its divisors is an integer number (8928000).

Almost surely, 2^999724950 is an apocalyptic number.

999724950 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 999724950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714176000).

999724950 is an abundant number, since it is smaller than the sum of its proper divisors (2428627050).

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

999724950 is a wasteful number, since it uses less digits than its factorization.

999724950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The square root of 999724950 is about 31618.4273802477. The cubic root of 999724950 is about 999.9083082595.

The spelling of 999724950 in words is "nine hundred ninety-nine million, seven hundred twenty-four thousand, nine hundred fifty".