4397146640 has 80 divisors (see below), whose sum is σ = 10595750400. Its totient is φ = 1695252480.

The previous prime is 4397146603. The next prime is 4397146667. The reversal of 4397146640 is 466417934.

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

It is a junction number, because it is equal to n+sod(n) for n = 4397146591 and 4397146600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633911 + ... + 640809.

It is an arithmetic number, because the mean of its divisors is an integer number (132446880).

Almost surely, 2^4397146640 is an apocalyptic number.

4397146640 is a gapful number since it is divisible by the number (40) 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 4397146640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5297875200).

4397146640 is an abundant number, since it is smaller than the sum of its proper divisors (6198603760).

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

4397146640 is a wasteful number, since it uses less digits than its factorization.

4397146640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7200 (or 7194 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 4397146640 is about 66310.9843087855. The cubic root of 4397146640 is about 1638.2882496749.

The spelling of 4397146640 in words is "four billion, three hundred ninety-seven million, one hundred forty-six thousand, six hundred forty".