3257880840 has 48 divisors (see below), whose sum is σ = 10588113900. Its totient is φ = 868768128.

The previous prime is 3257880827. The next prime is 3257880841. The reversal of 3257880840 is 480887523.

3257880840 is a `hidden beast` number, since 32 + 578 + 8 + 0 + 8 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3066279876 + 191600964 = 55374^2 + 13842^2 .

It is a super-2 number, since 2×3257880840² = 21227575135278211200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (3257880841) 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, 4524475 + ... + 4525194.

Almost surely, 2^3257880840 is an apocalyptic number.

3257880840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3257880840 is an abundant number, since it is smaller than the sum of its proper divisors (7330233060).

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

3257880840 is a wasteful number, since it uses less digits than its factorization.

3257880840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049686 (or 9049679 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 3257880840 is about 57077.8489433510. The cubic root of 3257880840 is about 1482.4443476270. Note that the first 3 decimals are identical.

The spelling of 3257880840 in words is "three billion, two hundred fifty-seven million, eight hundred eighty thousand, eight hundred forty".