870438 has 16 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 288456.

The previous prime is 870437. The next prime is 870461. The reversal of 870438 is 834078.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870431) 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, 1131 + ... + 1737.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2⁸⁷⁰⁴³⁸ is an apocalyptic number.

870438 is an abundant number, since it is smaller than the sum of its proper divisors (880602).

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

870438 is a wasteful number, since it uses less digits than its factorization.

870438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851.

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

The square root of 870438 is about 932.9726684100. The cubic root of 870438 is about 95.4800448058.

The spelling of 870438 in words is "eight hundred seventy thousand, four hundred thirty-eight".