3970030640 has 20 divisors (see below), whose sum is σ = 9230321424. Its totient is φ = 1588012224.

The previous prime is 3970030637. The next prime is 3970030657. The reversal of 3970030640 is 460300793.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×3970030640² = 31522286565077619200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3970030597 and 3970030606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24812612 + ... + 24812771.

Almost surely, 2^3970030640 is an apocalyptic number.

It is an amenable number.

3970030640 is an abundant number, since it is smaller than the sum of its proper divisors (5260290784).

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

3970030640 is a wasteful number, since it uses less digits than its factorization.

3970030640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49625396 (or 49625390 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 3970030640 is about 63008.1791515990. The cubic root of 3970030640 is about 1583.4266600822.

The spelling of 3970030640 in words is "three billion, nine hundred seventy million, thirty thousand, six hundred forty".