1897956 has 18 divisors (see below), whose sum is σ = 4797702. Its totient is φ = 632640.

The previous prime is 1897949. The next prime is 1897957. The reversal of 1897956 is 6597981.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 665856 = 1110^2 + 816^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-4 number, since 4×1897956⁴ (a number of 26 digits) contains 4444 as substring.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (1897957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26325 + ... + 26396.

It is an arithmetic number, because the mean of its divisors is an integer number (266539).

2^1897956 is an apocalyptic number.

It is an amenable number.

1897956 is an abundant number, since it is smaller than the sum of its proper divisors (2899746).

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

1897956 is a wasteful number, since it uses less digits than its factorization.

1897956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52731 (or 52726 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1897956 is about 1377.6632389666. The cubic root of 1897956 is about 123.8118026161.

The spelling of 1897956 in words is "one million, eight hundred ninety-seven thousand, nine hundred fifty-six".