1994478469 has 8 divisors (see below), whose sum is σ = 2114778240. Its totient is φ = 1875711456.

The previous prime is 1994478467. The next prime is 1994478481. The reversal of 1994478469 is 9648744991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1994478469 - 2¹ = 1994478467 is a prime.

It is a super-2 number, since 2×1994478469² = 7955888726609167922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994478467) 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, 380509 + ... + 385714.

It is an arithmetic number, because the mean of its divisors is an integer number (264347280).

Almost surely, 2^1994478469 is an apocalyptic number.

1994478469 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1994478469 is a deficient number, since it is larger than the sum of its proper divisors (120299771).

1994478469 is a wasteful number, since it uses less digits than its factorization.

1994478469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766379.

The product of its digits is 15676416, while the sum is 61.

The square root of 1994478469 is about 44659.5842904969. The cubic root of 1994478469 is about 1258.7605324108.

The spelling of 1994478469 in words is "one billion, nine hundred ninety-four million, four hundred seventy-eight thousand, four hundred sixty-nine".