1616402 has 18 divisors (see below), whose sum is σ = 2594709. Its totient is φ = 755160.

The previous prime is 1616401. The next prime is 1616429. The reversal of 1616402 is 2046161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1615441 + 961 = 1271^2 + 31^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=899.

It is a super-2 number, since 2×1616402² = 5225510851208, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 52127 + ... + 52157.

2^1616402 is an apocalyptic number.

1616402 is a deficient number, since it is larger than the sum of its proper divisors (978307).

1616402 is an equidigital number, since it uses as much as digits as its factorization.

1616402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 62 counting only the distinct ones).

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

The square root of 1616402 is about 1271.3779925734. The cubic root of 1616402 is about 117.3590160578.

Multiplying 1616402 by its product of nonzero digits (288), we get a square (465523776 = 21576²).

The spelling of 1616402 in words is "one million, six hundred sixteen thousand, four hundred two".