3216405072 has 80 divisors (see below), whose sum is σ = 8469592832. Its totient is φ = 1051522560.

The previous prime is 3216405053. The next prime is 3216405091. The reversal of 3216405072 is 2705046123.

It is an interprime number because it is at equal distance from previous prime (3216405053) and next prime (3216405091).

It is a congruent number.

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, 1161033 + ... + 1163799.

Almost surely, 2^3216405072 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 3216405072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4234796416).

3216405072 is an abundant number, since it is smaller than the sum of its proper divisors (5253187760).

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

3216405072 is a wasteful number, since it uses less digits than its factorization.

3216405072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236 (or 3230 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 3216405072 is about 56713.3588495691. The cubic root of 3216405072 is about 1476.1265084977.

The spelling of 3216405072 in words is "three billion, two hundred sixteen million, four hundred five thousand, seventy-two".