1820472 has 16 divisors (see below), whose sum is σ = 4551240. Its totient is φ = 606816.

The previous prime is 1820471. The next prime is 1820501. The reversal of 1820472 is 2740281.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 75853 = 1820472 / (1 + 8 + 2 + 0 + 4 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820471) 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, 37903 + ... + 37950.

2^1820472 is an apocalyptic number.

1820472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1820472 is an abundant number, since it is smaller than the sum of its proper divisors (2730768).

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

1820472 is a wasteful number, since it uses less digits than its factorization.

1820472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75862 (or 75858 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 1820472 is about 1349.2486798215. The cubic root of 1820472 is about 122.1034686148.

The spelling of 1820472 in words is "one million, eight hundred twenty thousand, four hundred seventy-two".