840038 has 16 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 382080.

The previous prime is 840023. The next prime is 840053. The reversal of 840038 is 830048.

840038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (840023) and next prime (840053).

It is a junction number, because it is equal to n+sod(n) for n = 839995 and 840022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656 + ... + 1452.

It is an arithmetic number, because the mean of its divisors is an integer number (86184).

2⁸⁴⁰⁰³⁸ is an apocalyptic number.

840038 is a deficient number, since it is larger than the sum of its proper divisors (538906).

840038 is a wasteful number, since it uses less digits than its factorization.

840038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 840038 is about 916.5358694563. The cubic root of 840038 is about 94.3553023815.

The spelling of 840038 in words is "eight hundred forty thousand, thirty-eight".