1533901998 has 32 divisors (see below), whose sum is σ = 3089433600. Its totient is φ = 507708576.

The previous prime is 1533901997. The next prime is 1533902003. The reversal of 1533901998 is 8991093351.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1533901997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601915 + ... + 604457.

It is an arithmetic number, because the mean of its divisors is an integer number (96544800).

Almost surely, 2^1533901998 is an apocalyptic number.

1533901998 is an abundant number, since it is smaller than the sum of its proper divisors (1555531602).

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

1533901998 is a wasteful number, since it uses less digits than its factorization.

1533901998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 262440, while the sum is 48.

The square root of 1533901998 is about 39165.0609344604. The cubic root of 1533901998 is about 1153.2740970129.

The spelling of 1533901998 in words is "one billion, five hundred thirty-three million, nine hundred one thousand, nine hundred ninety-eight".