1138403409 has 16 divisors (see below), whose sum is σ = 1783233984. Its totient is φ = 636868800.

The previous prime is 1138403401. The next prime is 1138403479. The reversal of 1138403409 is 9043048311.

It is not a de Polignac number, because 1138403409 - 2³ = 1138403401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 1138403409.

It is not an unprimeable number, because it can be changed into a prime (1138403401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326382 + ... + 1327239.

It is an arithmetic number, because the mean of its divisors is an integer number (111452124).

Almost surely, 2^1138403409 is an apocalyptic number.

It is an amenable number.

1138403409 is a deficient number, since it is larger than the sum of its proper divisors (644830575).

1138403409 is a wasteful number, since it uses less digits than its factorization.

1138403409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653648.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1138403409 is about 33740.2342760094. The cubic root of 1138403409 is about 1044.1560179553.

The spelling of 1138403409 in words is "one billion, one hundred thirty-eight million, four hundred three thousand, four hundred nine".