999456770 has 16 divisors (see below), whose sum is σ = 1937408760. Its totient is φ = 369030144.

The previous prime is 999456767. The next prime is 999456781. The reversal of 999456770 is 77654999.

It can be written as a sum of positive squares in 4 ways, for example, as 766680721 + 232776049 = 27689^2 + 15257^2 .

It is a super-4 number, since 4×999456770⁴ (a number of 37 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3843935 + ... + 3844194.

Almost surely, 2^999456770 is an apocalyptic number.

999456770 is a deficient number, since it is larger than the sum of its proper divisors (937951990).

999456770 is a wasteful number, since it uses less digits than its factorization.

999456770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7688149.

The product of its (nonzero) digits is 4286520, while the sum is 56.

The square root of 999456770 is about 31614.1862144196. The cubic root of 999456770 is about 999.8188905347.

The spelling of 999456770 in words is "nine hundred ninety-nine million, four hundred fifty-six thousand, seven hundred seventy".