2148399405 has 12 divisors (see below), whose sum is σ = 3723892380. Its totient is φ = 1145812992.

The previous prime is 2148399403. The next prime is 2148399427. The reversal of 2148399405 is 5049938412.

2148399405 is a `hidden beast` number, since 214 + 8 + 399 + 40 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 404251236 + 1744148169 = 20106^2 + 41763^2 .

It is not a de Polignac number, because 2148399405 - 2¹ = 2148399403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 47742209 = 2148399405 / (2 + 1 + 4 + 8 + 3 + 9 + 9 + 4 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2148399401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23871060 + ... + 23871149.

It is an arithmetic number, because the mean of its divisors is an integer number (310324365).

Almost surely, 2^2148399405 is an apocalyptic number.

It is an amenable number.

2148399405 is a deficient number, since it is larger than the sum of its proper divisors (1575492975).

2148399405 is a wasteful number, since it uses less digits than its factorization.

2148399405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47742220 (or 47742217 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2148399405 is about 46350.8296042261. The cubic root of 2148399405 is about 1290.3425176648.

The spelling of 2148399405 in words is "two billion, one hundred forty-eight million, three hundred ninety-nine thousand, four hundred five".