7352521380 has 72 divisors (see below), whose sum is σ = 23071721400. Its totient is φ = 1893061632.

The previous prime is 7352521361. The next prime is 7352521381. The reversal of 7352521380 is 831252537.

It is a happy number.

7352521380 is a `hidden beast` number, since 7 + 3 + 52 + 521 + 3 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2478247524 + 4874273856 = 49782^2 + 69816^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (7352521381) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 699045 + ... + 709484.

It is an arithmetic number, because the mean of its divisors is an integer number (320440575).

Almost surely, 2^7352521380 is an apocalyptic number.

It is an amenable number.

7352521380 is an abundant number, since it is smaller than the sum of its proper divisors (15719200020).

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

7352521380 is a wasteful number, since it uses less digits than its factorization.

7352521380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408573 (or 1408568 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 7352521380 is about 85746.8447232900. The cubic root of 7352521380 is about 1944.5185865631.

The spelling of 7352521380 in words is "seven billion, three hundred fifty-two million, five hundred twenty-one thousand, three hundred eighty".