1616620 has 12 divisors (see below), whose sum is σ = 3394944. Its totient is φ = 646640.

The previous prime is 1616617. The next prime is 1616621. The reversal of 1616620 is 266161.

It is a super-2 number, since 2×1616620² = 5226920448800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616591 and 1616600.

It is not an unprimeable number, because it can be changed into a prime (1616621) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40396 + ... + 40435.

It is an arithmetic number, because the mean of its divisors is an integer number (282912).

2^1616620 is an apocalyptic number.

1616620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616620 is an abundant number, since it is smaller than the sum of its proper divisors (1778324).

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

1616620 is a wasteful number, since it uses less digits than its factorization.

1616620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80840 (or 80838 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1616620 is about 1271.4637234306. The cubic root of 1616620 is about 117.3642917907.

The spelling of 1616620 in words is "one million, six hundred sixteen thousand, six hundred twenty".