999743472 has 400 divisors, whose sum is σ = 3654974400. Its totient is φ = 262144512.

The previous prime is 999743449. The next prime is 999743513. The reversal of 999743472 is 274347999.

It is a happy number.

It is a super-2 number, since 2×999743472² = 1998974019613229568, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5778778 + ... + 5778950.

It is an arithmetic number, because the mean of its divisors is an integer number (9137436).

Almost surely, 2^999743472 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 999743472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827487200).

999743472 is an abundant number, since it is smaller than the sum of its proper divisors (2655230928).

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

999743472 is a wasteful number, since it uses less digits than its factorization.

999743472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 198 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The square root of 999743472 is about 31618.7202777089. The cubic root of 999743472 is about 999.9144833538.

The spelling of 999743472 in words is "nine hundred ninety-nine million, seven hundred forty-three thousand, four hundred seventy-two".