3897915210 has 480 divisors, whose sum is σ = 13273690320. Its totient is φ = 815173632.

The previous prime is 3897915199. The next prime is 3897915239. The reversal of 3897915210 is 125197983.

3897915210 is a `hidden beast` number, since 38 + 9 + 7 + 91 + 521 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3024890001 + 873025209 = 54999^2 + 29547^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 35760636 + ... + 35760744.

Almost surely, 2^3897915210 is an apocalyptic number.

3897915210 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3897915210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6636845160).

3897915210 is an abundant number, since it is smaller than the sum of its proper divisors (9375775110).

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

3897915210 is a wasteful number, since it uses less digits than its factorization.

3897915210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 3897915210 is about 62433.2860740166. The cubic root of 3897915210 is about 1573.7803891640.

The spelling of 3897915210 in words is "three billion, eight hundred ninety-seven million, nine hundred fifteen thousand, two hundred ten".