1578870 has 48 divisors (see below), whose sum is σ = 4195152. Its totient is φ = 411840.

The previous prime is 1578859. The next prime is 1578877. The reversal of 1578870 is 788751.

1578870 is a `hidden beast` number, since 1 + 578 + 87 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1578877) 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 23 ways as a sum of consecutive naturals, for example, 4605 + ... + 4935.

It is an arithmetic number, because the mean of its divisors is an integer number (87399).

2^1578870 is an apocalyptic number.

1578870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1578870 is the 795-th heptagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1578870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2097576).

1578870 is an abundant number, since it is smaller than the sum of its proper divisors (2616282).

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

1578870 is a wasteful number, since it uses less digits than its factorization.

1578870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 1578870 is about 1256.5309387357. The cubic root of 1578870 is about 116.4435554576.

The spelling of 1578870 in words is "one million, five hundred seventy-eight thousand, eight hundred seventy".