1438231146 has 64 divisors (see below), whose sum is σ = 3173548032. Its totient is φ = 430920000.

The previous prime is 1438231139. The next prime is 1438231153. The reversal of 1438231146 is 6411328341.

It is an interprime number because it is at equal distance from previous prime (1438231139) and next prime (1438231153).

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3416016 + ... + 3416436.

It is an arithmetic number, because the mean of its divisors is an integer number (49586688).

Almost surely, 2^1438231146 is an apocalyptic number.

1438231146 is an abundant number, since it is smaller than the sum of its proper divisors (1735316886).

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

1438231146 is a wasteful number, since it uses less digits than its factorization.

1438231146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its digits is 13824, while the sum is 33.

The square root of 1438231146 is about 37924.0180624364. The cubic root of 1438231146 is about 1128.7806687203.

Adding to 1438231146 its reverse (6411328341), we get a palindrome (7849559487).

The spelling of 1438231146 in words is "one billion, four hundred thirty-eight million, two hundred thirty-one thousand, one hundred forty-six".