3787521820 has 12 divisors (see below), whose sum is σ = 7953795864. Its totient is φ = 1515008720.

The previous prime is 3787521811. The next prime is 3787521839. The reversal of 3787521820 is 281257873.

It is a super-2 number, since 2×3787521820² = 28690643073952224800, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94688026 + ... + 94688065.

It is an arithmetic number, because the mean of its divisors is an integer number (662816322).

Almost surely, 2^3787521820 is an apocalyptic number.

It is an amenable number.

3787521820 is an abundant number, since it is smaller than the sum of its proper divisors (4166274044).

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

3787521820 is a wasteful number, since it uses less digits than its factorization.

3787521820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189376100 (or 189376098 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 3787521820 is about 61542.8454005825. The cubic root of 3787521820 is about 1558.7808000813.

It can be divided in two parts, 37875 and 21820, that added together give a palindrome (59695).

The spelling of 3787521820 in words is "three billion, seven hundred eighty-seven million, five hundred twenty-one thousand, eight hundred twenty".