1438291406 has 16 divisors (see below), whose sum is σ = 2207079600. Its totient is φ = 702779328.

The previous prime is 1438291403. The next prime is 1438291423. The reversal of 1438291406 is 6041928341.

It is a self number, because there is not a number n which added to its sum of digits gives 1438291406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438291403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29276 + ... + 61103.

It is an arithmetic number, because the mean of its divisors is an integer number (137942475).

Almost surely, 2^1438291406 is an apocalyptic number.

1438291406 is a deficient number, since it is larger than the sum of its proper divisors (768788194).

1438291406 is a wasteful number, since it uses less digits than its factorization.

1438291406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90563.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1438291406 is about 37924.8125374404. The cubic root of 1438291406 is about 1128.7964333103.

The spelling of 1438291406 in words is "one billion, four hundred thirty-eight million, two hundred ninety-one thousand, four hundred six".