3898632720 has 80 divisors (see below), whose sum is σ = 12256036992. Its totient is φ = 1024988160.

The previous prime is 3898632653. The next prime is 3898632721. The reversal of 3898632720 is 272368983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 3898632720.

It is not an unprimeable number, because it can be changed into a prime (3898632721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97357 + ... + 131436.

Almost surely, 2^3898632720 is an apocalyptic number.

3898632720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3898632720 is an abundant number, since it is smaller than the sum of its proper divisors (8357404272).

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

3898632720 is a wasteful number, since it uses less digits than its factorization.

3898632720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228880 (or 228874 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 3898632720 is about 62439.0320232465. The cubic root of 3898632720 is about 1573.8769479506.

The spelling of 3898632720 in words is "three billion, eight hundred ninety-eight million, six hundred thirty-two thousand, seven hundred twenty".