840738 has 8 divisors (see below), whose sum is σ = 1681488. Its totient is φ = 280244.

The previous prime is 840733. The next prime is 840743. The reversal of 840738 is 837048.

It is an interprime number because it is at equal distance from previous prime (840733) and next prime (840743).

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

840738 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (840733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70056 + ... + 70067.

It is an arithmetic number, because the mean of its divisors is an integer number (210186).

2⁸⁴⁰⁷³⁸ is an apocalyptic number.

840738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

840738 is a wasteful number, since it uses less digits than its factorization.

840738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140128.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 840738 is about 916.9176626066. The cubic root of 840738 is about 94.3815037256.

The spelling of 840738 in words is "eight hundred forty thousand, seven hundred thirty-eight".