3391521408 has 128 divisors (see below), whose sum is σ = 10919793600. Its totient is φ = 1027722240.

The previous prime is 3391521389. The next prime is 3391521431. The reversal of 3391521408 is 8041251933.

3391521408 is a `hidden beast` number, since 3 + 3 + 91 + 521 + 40 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 6591 + ... + 82622.

Almost surely, 2^3391521408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3391521408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5459896800).

3391521408 is an abundant number, since it is smaller than the sum of its proper divisors (7528272192).

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

3391521408 is a wasteful number, since it uses less digits than its factorization.

3391521408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89247 (or 89229 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 3391521408 is about 58236.7702401155. The cubic root of 3391521408 is about 1502.4436329436.

The spelling of 3391521408 in words is "three billion, three hundred ninety-one million, five hundred twenty-one thousand, four hundred eight".