1861408 has 12 divisors (see below), whose sum is σ = 3664710. Its totient is φ = 930688.

The previous prime is 1861403. The next prime is 1861417. The reversal of 1861408 is 8041681.

It can be written as a sum of positive squares in only one way, i.e., 1710864 + 150544 = 1308^2 + 388^2 .

It is not an unprimeable number, because it can be changed into a prime (1861403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29053 + ... + 29116.

2^1861408 is an apocalyptic number.

It is an amenable number.

1861408 is a deficient number, since it is larger than the sum of its proper divisors (1803302).

1861408 is an equidigital number, since it uses as much as digits as its factorization.

1861408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58179 (or 58171 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1861408 is about 1364.3342698914. The cubic root of 1861408 is about 123.0119185578.

The spelling of 1861408 in words is "one million, eight hundred sixty-one thousand, four hundred eight".