38400019 has 8 divisors (see below), whose sum is σ = 44051040. Its totient is φ = 32790336.

The previous prime is 38399983. The next prime is 38400023. The reversal of 38400019 is 91000483.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38400019 is a prime.

It is a super-2 number, since 2×38400019² = 2949122918400722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38399966 and 38400002.

It is not an unprimeable number, because it can be changed into a prime (38400319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8314 + ... + 12079.

It is an arithmetic number, because the mean of its divisors is an integer number (5506380).

Almost surely, 2^38400019 is an apocalyptic number.

38400019 is a deficient number, since it is larger than the sum of its proper divisors (5651021).

38400019 is a wasteful number, since it uses less digits than its factorization.

38400019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20669.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 38400019 is about 6196.7748869876. The cubic root of 38400019 is about 337.3731217638.

The spelling of 38400019 in words is "thirty-eight million, four hundred thousand, nineteen".