1604178432 has 200 divisors, whose sum is σ = 4895865216. Its totient is φ = 522713088.

The previous prime is 1604178409. The next prime is 1604178449. The reversal of 1604178432 is 2348714061.

1604178432 is a `hidden beast` number, since 1 + 604 + 1 + 7 + 8 + 43 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1948773 + ... + 1949595.

Almost surely, 2^1604178432 is an apocalyptic number.

1604178432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604178432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2447932608).

1604178432 is an abundant number, since it is smaller than the sum of its proper divisors (3291686784).

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

1604178432 is an frugal number, since it uses more digits than its factorization.

1604178432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 1604178432 is about 40052.1963442706. The cubic root of 1604178432 is about 1170.6243610356.

The spelling of 1604178432 in words is "one billion, six hundred four million, one hundred seventy-eight thousand, four hundred thirty-two".