1851480 has 96 divisors (see below), whose sum is σ = 6224400. Its totient is φ = 476928.

The previous prime is 1851469. The next prime is 1851491. The reversal of 1851480 is 841581.

1851480 is a `hidden beast` number, since 185 + 1 + 480 = 666.

It is an interprime number because it is at equal distance from previous prime (1851469) and next prime (1851491).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13251 + ... + 13389.

2^1851480 is an apocalyptic number.

1851480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3112200).

1851480 is an abundant number, since it is smaller than the sum of its proper divisors (4372920).

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

1851480 is a wasteful number, since it uses less digits than its factorization.

1851480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 1851480 is about 1360.6910009256. The cubic root of 1851480 is about 122.7928299209.

The spelling of 1851480 in words is "one million, eight hundred fifty-one thousand, four hundred eighty".