3721382028 has 540 divisors, whose sum is σ = 13075884360. Its totient is φ = 917070336.

The previous prime is 3721382023. The next prime is 3721382029. The reversal of 3721382028 is 8202831273.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 3721381983 and 3721382001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721382023) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 50977800 + ... + 50977872.

Almost surely, 2^3721382028 is an apocalyptic number.

3721382028 is a gapful number since it is divisible by the number (38) 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 3721382028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6537942180).

3721382028 is an abundant number, since it is smaller than the sum of its proper divisors (9354502332).

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

3721382028 is a wasteful number, since it uses less digits than its factorization.

3721382028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 3721382028 is about 61003.1312966802. The cubic root of 3721382028 is about 1549.6540369727.

The spelling of 3721382028 in words is "three billion, seven hundred twenty-one million, three hundred eighty-two thousand, twenty-eight".