3524781820 has 24 divisors (see below), whose sum is σ = 8459476704. Its totient is φ = 1208496576.

The previous prime is 3524781811. The next prime is 3524781851. The reversal of 3524781820 is 281874253.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12588367 + ... + 12588646.

It is an arithmetic number, because the mean of its divisors is an integer number (352478196).

Almost surely, 2^3524781820 is an apocalyptic number.

It is an amenable number.

3524781820 is an abundant number, since it is smaller than the sum of its proper divisors (4934694884).

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

3524781820 is a wasteful number, since it uses less digits than its factorization.

3524781820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25177029 (or 25177027 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 3524781820 is about 59369.8729996957. The cubic root of 3524781820 is about 1521.8694996730.

The spelling of 3524781820 in words is "three billion, five hundred twenty-four million, seven hundred eighty-one thousand, eight hundred twenty".