1897138 has 16 divisors (see below), whose sum is σ = 3020544. Its totient is φ = 892080.

The previous prime is 1897127. The next prime is 1897139. The reversal of 1897138 is 8317981.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 1897097 and 1897106.

It is not an unprimeable number, because it can be changed into a prime (1897139) 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, 1881 + ... + 2707.

It is an arithmetic number, because the mean of its divisors is an integer number (188784).

2^1897138 is an apocalyptic number.

1897138 is a deficient number, since it is larger than the sum of its proper divisors (1123406).

1897138 is a wasteful number, since it uses less digits than its factorization.

1897138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its digits is 12096, while the sum is 37.

The square root of 1897138 is about 1377.3663274525. The cubic root of 1897138 is about 123.7940128451.

The spelling of 1897138 in words is "one million, eight hundred ninety-seven thousand, one hundred thirty-eight".