1616420 has 24 divisors (see below), whose sum is σ = 3656184. Its totient is φ = 596736.

The previous prime is 1616401. The next prime is 1616429. The reversal of 1616420 is 246161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 98596 + 1517824 = 314^2 + 1232^2 .

It is a super-2 number, since 2×1616420² = 5225627232800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1616392 and 1616401.

It is not an unprimeable number, because it can be changed into a prime (1616429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2849 + ... + 3368.

It is an arithmetic number, because the mean of its divisors is an integer number (152341).

2^1616420 is an apocalyptic number.

1616420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616420 is an abundant number, since it is smaller than the sum of its proper divisors (2039764).

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

1616420 is a wasteful number, since it uses less digits than its factorization.

1616420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6239 (or 6237 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1616420 is about 1271.3850714870. The cubic root of 1616420 is about 117.3594516868.

The spelling of 1616420 in words is "one million, six hundred sixteen thousand, four hundred twenty".