1861480 has 32 divisors (see below), whose sum is σ = 4228200. Its totient is φ = 737536.

The previous prime is 1861471. The next prime is 1861493. The reversal of 1861480 is 841681.

It can be written as a sum of positive squares in 4 ways, for example, as 1454436 + 407044 = 1206^2 + 638^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6786 + ... + 7054.

2^1861480 is an apocalyptic number.

1861480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1861480 is an abundant number, since it is smaller than the sum of its proper divisors (2366720).

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

1861480 is a wasteful number, since it uses less digits than its factorization.

1861480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 449 counting only the distinct ones).

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

The square root of 1861480 is about 1364.3606561317. The cubic root of 1861480 is about 123.0135045873.

The spelling of 1861480 in words is "one million, eight hundred sixty-one thousand, four hundred eighty".