1620180 has 36 divisors (see below), whose sum is σ = 4915092. Its totient is φ = 432000.

The previous prime is 1620161. The next prime is 1620209. The reversal of 1620180 is 810261.

It can be written as a sum of positive squares in 2 ways, for example, as 427716 + 1192464 = 654^2 + 1092^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 4321 + ... + 4680.

2^1620180 is an apocalyptic number.

1620180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620180 is an abundant number, since it is smaller than the sum of its proper divisors (3294912).

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

1620180 is a wasteful number, since it uses less digits than its factorization.

1620180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9016 (or 9011 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1620180 is about 1272.8629148498. The cubic root of 1620180 is about 117.4503789269.

It can be divided in two parts, 1620 and 180, that multiplied together give a square (291600 = 540²).

The spelling of 1620180 in words is "one million, six hundred twenty thousand, one hundred eighty".