1861960 has 16 divisors (see below), whose sum is σ = 4189500. Its totient is φ = 744768.

The previous prime is 1861927. The next prime is 1861961. The reversal of 1861960 is 691681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1758276 + 103684 = 1326^2 + 322^2 .

It is not an unprimeable number, because it can be changed into a prime (1861961) 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, 23235 + ... + 23314.

2^1861960 is an apocalyptic number.

1861960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1861960 is an abundant number, since it is smaller than the sum of its proper divisors (2327540).

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

1861960 is a wasteful number, since it uses less digits than its factorization.

1861960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46560 (or 46556 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1861960 is about 1364.5365513609. The cubic root of 1861960 is about 123.0240770722.

The spelling of 1861960 in words is "one million, eight hundred sixty-one thousand, nine hundred sixty".