3654521920 has 84 divisors (see below), whose sum is σ = 10123162380. Its totient is φ = 1252973568.

The previous prime is 3654521887. The next prime is 3654521929. The reversal of 3654521920 is 291254563.

It can be written as a sum of positive squares in 2 ways, for example, as 1040449536 + 2614072384 = 32256^2 + 51128^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3654521920.

It is not an unprimeable number, because it can be changed into a prime (3654521929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100855 + ... + 132214.

Almost surely, 2^3654521920 is an apocalyptic number.

It is an amenable number.

3654521920 is an abundant number, since it is smaller than the sum of its proper divisors (6468640460).

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

3654521920 is a wasteful number, since it uses less digits than its factorization.

3654521920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233100 (or 233083 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 3654521920 is about 60452.6419604636. The cubic root of 3654521920 is about 1540.3172899954.

The spelling of 3654521920 in words is "three billion, six hundred fifty-four million, five hundred twenty-one thousand, nine hundred twenty".