3898020644 has 24 divisors (see below), whose sum is σ = 8254632960. Its totient is φ = 1572310656.

The previous prime is 3898020641. The next prime is 3898020667. The reversal of 3898020644 is 4460208983.

It is a junction number, because it is equal to n+sod(n) for n = 3898020595 and 3898020604.

It is not an unprimeable number, because it can be changed into a prime (3898020641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4094084 + ... + 4095035.

It is an arithmetic number, because the mean of its divisors is an integer number (343943040).

Almost surely, 2^3898020644 is an apocalyptic number.

3898020644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3898020644 is an abundant number, since it is smaller than the sum of its proper divisors (4356612316).

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

3898020644 is a wasteful number, since it uses less digits than its factorization.

3898020644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8189147 (or 8189145 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 3898020644 is about 62434.1304416102. The cubic root of 3898020644 is about 1573.7945786693.

The spelling of 3898020644 in words is "three billion, eight hundred ninety-eight million, twenty thousand, six hundred forty-four".