1620704 has 12 divisors (see below), whose sum is σ = 3190824. Its totient is φ = 810336.

The previous prime is 1620679. The next prime is 1620733. The reversal of 1620704 is 4070261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25292 + ... + 25355.

It is an arithmetic number, because the mean of its divisors is an integer number (265902).

2^1620704 is an apocalyptic number.

It is an amenable number.

1620704 is a deficient number, since it is larger than the sum of its proper divisors (1570120).

1620704 is an equidigital number, since it uses as much as digits as its factorization.

1620704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50657 (or 50649 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1620704 is about 1273.0687334154. The cubic root of 1620704 is about 117.4630395294.

Adding to 1620704 its reverse (4070261), we get a palindrome (5690965).

The spelling of 1620704 in words is "one million, six hundred twenty thousand, seven hundred four".