3725333280 has 144 divisors (see below), whose sum is σ = 12754365624. Its totient is φ = 990167040.

The previous prime is 3725333203. The next prime is 3725333303. The reversal of 3725333280 is 823335273.

3725333280 is a `hidden beast` number, since 372 + 5 + 3 + 3 + 3 + 280 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1797420816 + 1927912464 = 42396^2 + 43908^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×3725333280³ (a number of 30 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452400 + ... + 460560.

Almost surely, 2^3725333280 is an apocalyptic number.

3725333280 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3725333280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6377182812).

3725333280 is an abundant number, since it is smaller than the sum of its proper divisors (9029032344).

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

3725333280 is a wasteful number, since it uses less digits than its factorization.

3725333280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8499 (or 8488 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 3725333280 is about 61035.5083537444. The cubic root of 3725333280 is about 1550.2023017254.

The spelling of 3725333280 in words is "three billion, seven hundred twenty-five million, three hundred thirty-three thousand, two hundred eighty".