994878390 has 64 divisors (see below), whose sum is σ = 2608070400. Its totient is φ = 240877440.

The previous prime is 994878389. The next prime is 994878397. The reversal of 994878390 is 93878499.

It is a self number, because there is not a number n which added to its sum of digits gives 994878390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994878397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 367261 + ... + 369959.

It is an arithmetic number, because the mean of its divisors is an integer number (40751100).

Almost surely, 2^994878390 is an apocalyptic number.

994878390 is an abundant number, since it is smaller than the sum of its proper divisors (1613192010).

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

994878390 is a wasteful number, since it uses less digits than its factorization.

994878390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The square root of 994878390 is about 31541.6928841811. The cubic root of 994878390 is about 998.2898738022.

The spelling of 994878390 in words is "nine hundred ninety-four million, eight hundred seventy-eight thousand, three hundred ninety".