999781152 has 48 divisors (see below), whose sum is σ = 2778808032. Its totient is φ = 313656320.

The previous prime is 999781151. The next prime is 999781199. The reversal of 999781152 is 251187999.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 999781095 and 999781104.

It is not an unprimeable number, because it can be changed into a prime (999781151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304674 + ... + 307937.

It is an arithmetic number, because the mean of its divisors is an integer number (57891834).

Almost surely, 2^999781152 is an apocalyptic number.

It is an amenable number.

999781152 is an abundant number, since it is smaller than the sum of its proper divisors (1779026880).

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

999781152 is a wasteful number, since it uses less digits than its factorization.

999781152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612641 (or 612633 counting only the distinct ones).

The product of its digits is 408240, while the sum is 51.

The square root of 999781152 is about 31619.3161216368. The cubic root of 999781152 is about 999.9270453444.

The spelling of 999781152 in words is "nine hundred ninety-nine million, seven hundred eighty-one thousand, one hundred fifty-two".