3780028 has 24 divisors (see below), whose sum is σ = 7626752. Its totient is φ = 1605744.

The previous prime is 3780017. The next prime is 3780037. The reversal of 3780028 is 8200873.

It is a happy number.

It is a super-2 number, since 2×3780028² = 28577223361568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 3779978 and 3780005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3025 + ... + 4087.

Almost surely, 2^3780028 is an apocalyptic number.

It is an amenable number.

3780028 is an abundant number, since it is smaller than the sum of its proper divisors (3846724).

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

3780028 is a wasteful number, since it uses less digits than its factorization.

3780028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1199 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 3780028 is about 1944.2294103320. The cubic root of 3780028 is about 155.7752076838.

The spelling of 3780028 in words is "three million, seven hundred eighty thousand, twenty-eight".