3720828 has 24 divisors (see below), whose sum is σ = 8744400. Its totient is φ = 1231360.

The previous prime is 3720811. The next prime is 3720839. The reversal of 3720828 is 8280273.

It is a super-2 number, since 2×3720828² = 27689122011168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 3720795 and 3720804.

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, 748 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (364350).

Almost surely, 2^3720828 is an apocalyptic number.

It is an amenable number.

3720828 is an abundant number, since it is smaller than the sum of its proper divisors (5023572).

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

3720828 is a wasteful number, since it uses less digits than its factorization.

3720828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 3720828 is about 1928.9447892566. The cubic root of 3720828 is about 154.9577130568.

The spelling of 3720828 in words is "three million, seven hundred twenty thousand, eight hundred twenty-eight".