1604624004 has 36 divisors (see below), whose sum is σ = 4116678384. Its totient is φ = 526890672.

The previous prime is 1604623939. The next prime is 1604624017. The reversal of 1604624004 is 4004264061.

1604624004 is a `hidden beast` number, since 160 + 462 + 40 + 0 + 4 = 666.

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

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, 330222 + ... + 335045.

Almost surely, 2^1604624004 is an apocalyptic number.

It is an amenable number.

1604624004 is an abundant number, since it is smaller than the sum of its proper divisors (2512054380).

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

1604624004 is a wasteful number, since it uses less digits than its factorization.

1604624004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665344 (or 665339 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1604624004 is about 40057.7583496631. The cubic root of 1604624004 is about 1170.7327340907.

Adding to 1604624004 its reverse (4004264061), we get a palindrome (5608888065).

The spelling of 1604624004 in words is "one billion, six hundred four million, six hundred twenty-four thousand, four".