1820070 has 96 divisors (see below), whose sum is σ = 5660928. Its totient is φ = 412128.

The previous prime is 1820051. The next prime is 1820087. The reversal of 1820070 is 700281.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16957 + ... + 17063.

It is an arithmetic number, because the mean of its divisors is an integer number (58968).

2^1820070 is an apocalyptic number.

1820070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2830464).

1820070 is an abundant number, since it is smaller than the sum of its proper divisors (3840858).

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

1820070 is a wasteful number, since it uses less digits than its factorization.

1820070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1820070 is about 1349.0996997998. The cubic root of 1820070 is about 122.0944802484.

The spelling of 1820070 in words is "one million, eight hundred twenty thousand, seventy".