1438100019 has 6 divisors (see below), whose sum is σ = 2077255596. Its totient is φ = 958733340.

The previous prime is 1438100011. The next prime is 1438100021. The reversal of 1438100019 is 9100018341.

It is not a de Polignac number, because 1438100019 - 2³ = 1438100011 is a prime.

It is a super-2 number, since 2×1438100019² = 4136263329295600722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1438099965 and 1438100001.

It is not an unprimeable number, because it can be changed into a prime (1438100011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79894437 + ... + 79894454.

It is an arithmetic number, because the mean of its divisors is an integer number (346209266).

Almost surely, 2^1438100019 is an apocalyptic number.

1438100019 is a deficient number, since it is larger than the sum of its proper divisors (639155577).

1438100019 is a wasteful number, since it uses less digits than its factorization.

1438100019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159788897 (or 159788894 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1438100019 is about 37922.2892109640. The cubic root of 1438100019 is about 1128.7463631263.

The spelling of 1438100019 in words is "one billion, four hundred thirty-eight million, one hundred thousand, nineteen".