3685553980 has 24 divisors (see below), whose sum is σ = 7740846288. Its totient is φ = 1473996288.

The previous prime is 3685553957. The next prime is 3685553987. The reversal of 3685553980 is 893555863.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685553987) by changing a digit.

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, 197827 + ... + 215653.

It is an arithmetic number, because the mean of its divisors is an integer number (322535262).

Almost surely, 2^3685553980 is an apocalyptic number.

It is an amenable number.

3685553980 is an abundant number, since it is smaller than the sum of its proper divisors (4055292308).

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

3685553980 is a wasteful number, since it uses less digits than its factorization.

3685553980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28173 (or 28171 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 52.

The square root of 3685553980 is about 60708.7636177842. The cubic root of 3685553980 is about 1544.6648316561.

The spelling of 3685553980 in words is "three billion, six hundred eighty-five million, five hundred fifty-three thousand, nine hundred eighty".