3926246640 has 80 divisors (see below), whose sum is σ = 12811977600. Its totient is φ = 991892736.

The previous prime is 3926246609. The next prime is 3926246641. The reversal of 3926246640 is 466426293.

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

It is a super-2 number, since 2×3926246640² = 30830825356222579200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3926246592 and 3926246601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3926246641) 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, 425950 + ... + 435069.

It is an arithmetic number, because the mean of its divisors is an integer number (160149720).

Almost surely, 2^3926246640 is an apocalyptic number.

3926246640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3926246640 is an abundant number, since it is smaller than the sum of its proper divisors (8885730960).

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

3926246640 is a wasteful number, since it uses less digits than its factorization.

3926246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861054 (or 861048 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 3926246640 is about 62659.7689111602. The cubic root of 3926246640 is about 1577.5841196918.

The spelling of 3926246640 in words is "three billion, nine hundred twenty-six million, two hundred forty-six thousand, six hundred forty".