3257343540 has 72 divisors (see below), whose sum is σ = 10778852448. Its totient is φ = 789658560.

The previous prime is 3257343521. The next prime is 3257343547. The reversal of 3257343540 is 453437523.

3257343540 is a `hidden beast` number, since 3 + 2 + 5 + 73 + 43 + 540 = 666.

It is a super-2 number, since 2×3257343540² = 21220573875159463200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 3257343495 and 3257343504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3257343547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 820582 + ... + 824541.

It is an arithmetic number, because the mean of its divisors is an integer number (149706284).

Almost surely, 2^3257343540 is an apocalyptic number.

3257343540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3257343540 is an abundant number, since it is smaller than the sum of its proper divisors (7521508908).

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

3257343540 is a wasteful number, since it uses less digits than its factorization.

3257343540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645149 (or 1645144 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 36.

The square root of 3257343540 is about 57073.1420196926. The cubic root of 3257343540 is about 1482.3628466781.

The spelling of 3257343540 in words is "three billion, two hundred fifty-seven million, three hundred forty-three thousand, five hundred forty".