1801667328 has 36 divisors (see below), whose sum is σ = 4795064568. Its totient is φ = 600555520.

The previous prime is 1801667321. The next prime is 1801667333. The reversal of 1801667328 is 8237661081.

It is a self number, because there is not a number n which added to its sum of digits gives 1801667328.

It is not an unprimeable number, because it can be changed into a prime (1801667321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172193 + ... + 1173728.

It is an arithmetic number, because the mean of its divisors is an integer number (133196238).

Almost surely, 2^1801667328 is an apocalyptic number.

It is an amenable number.

1801667328 is an abundant number, since it is smaller than the sum of its proper divisors (2993397240).

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

1801667328 is an equidigital number, since it uses as much as digits as its factorization.

1801667328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345940 (or 2345926 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1801667328 is about 42446.0519718854. The cubic root of 1801667328 is about 1216.8158767484.

The spelling of 1801667328 in words is "one billion, eight hundred one million, six hundred sixty-seven thousand, three hundred twenty-eight".