2149478406 has 12 divisors (see below), whose sum is σ = 4657203252. Its totient is φ = 716492796.

The previous prime is 2149478371. The next prime is 2149478431. The reversal of 2149478406 is 6048749412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59707716 + ... + 59707751.

It is an arithmetic number, because the mean of its divisors is an integer number (388100271).

Almost surely, 2^2149478406 is an apocalyptic number.

2149478406 is an abundant number, since it is smaller than the sum of its proper divisors (2507724846).

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

2149478406 is a wasteful number, since it uses less digits than its factorization.

2149478406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119415475 (or 119415472 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 2149478406 is about 46362.4676435584. The cubic root of 2149478406 is about 1290.5584998272.

The spelling of 2149478406 in words is "two billion, one hundred forty-nine million, four hundred seventy-eight thousand, four hundred six".