1398408939 has 12 divisors (see below), whose sum is σ = 2040749256. Its totient is φ = 922660992.

The previous prime is 1398408937. The next prime is 1398409003. The reversal of 1398408939 is 9398048931.

It is not a de Polignac number, because 1398408939 - 2¹ = 1398408937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398408931) 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, 800049 + ... + 801794.

It is an arithmetic number, because the mean of its divisors is an integer number (170062438).

Almost surely, 2^1398408939 is an apocalyptic number.

1398408939 is a deficient number, since it is larger than the sum of its proper divisors (642340317).

1398408939 is a wasteful number, since it uses less digits than its factorization.

1398408939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601946 (or 1601943 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 1398408939 is about 37395.3063766029. The cubic root of 1398408939 is about 1118.2649951665.

The spelling of 1398408939 in words is "one billion, three hundred ninety-eight million, four hundred eight thousand, nine hundred thirty-nine".