1870138 has 8 divisors (see below), whose sum is σ = 2851380. Its totient is φ = 919680.

The previous prime is 1870129. The next prime is 1870139. The reversal of 1870138 is 8310781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1375929 + 494209 = 1173^2 + 703^2 .

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

It is a super-2 number, since 2×1870138² = 6994832278088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1870139) 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, 7543 + ... + 7786.

2^1870138 is an apocalyptic number.

1870138 is a deficient number, since it is larger than the sum of its proper divisors (981242).

1870138 is a wasteful number, since it uses less digits than its factorization.

1870138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15392.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1870138 is about 1367.5298899841. The cubic root of 1870138 is about 123.2039272515.

The spelling of 1870138 in words is "one million, eight hundred seventy thousand, one hundred thirty-eight".