999978010 has 16 divisors (see below), whose sum is σ = 1802476800. Its totient is φ = 399432016.

The previous prime is 999977989. The next prime is 999978011. The reversal of 999978010 is 10879999.

It is not an unprimeable number, because it can be changed into a prime (999978011) 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, 62350 + ... + 76729.

It is an arithmetic number, because the mean of its divisors is an integer number (112654800).

Almost surely, 2^999978010 is an apocalyptic number.

999978010 is a deficient number, since it is larger than the sum of its proper divisors (802498790).

999978010 is a wasteful number, since it uses less digits than its factorization.

999978010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139805.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 999978010 is about 31622.4289073436. The cubic root of 999978010 is about 999.9926699463.

The spelling of 999978010 in words is "nine hundred ninety-nine million, nine hundred seventy-eight thousand, ten".