3902321280 has 512 divisors, whose sum is σ = 14916545280. Its totient is φ = 855244800.

The previous prime is 3902321279. The next prime is 3902321281. The reversal of 3902321280 is 821232093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3902321279) and next prime (3902321281).

It is a super-2 number, since 2×3902321280² = 30456222744681676800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (3902321281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16748044 + ... + 16748276.

Almost surely, 2^3902321280 is an apocalyptic number.

3902321280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3902321280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7458272640).

3902321280 is an abundant number, since it is smaller than the sum of its proper divisors (11014224000).

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

3902321280 is a wasteful number, since it uses less digits than its factorization.

3902321280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 3902321280 is about 62468.5623333849. The cubic root of 3902321280 is about 1574.3731483787.

The spelling of 3902321280 in words is "three billion, nine hundred two million, three hundred twenty-one thousand, two hundred eighty".