1861436 has 12 divisors (see below), whose sum is σ = 3399312. Its totient is φ = 890208.

The previous prime is 1861417. The next prime is 1861469. The reversal of 1861436 is 6341681.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1861399 and 1861408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10025 + ... + 10208.

It is an arithmetic number, because the mean of its divisors is an integer number (283276).

2^1861436 is an apocalyptic number.

It is an amenable number.

1861436 is a deficient number, since it is larger than the sum of its proper divisors (1537876).

1861436 is a wasteful number, since it uses less digits than its factorization.

1861436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20260 (or 20258 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 1861436 is about 1364.3445312677. The cubic root of 1861436 is about 123.0125353519.

The spelling of 1861436 in words is "one million, eight hundred sixty-one thousand, four hundred thirty-six".