3457040 has 40 divisors (see below), whose sum is σ = 8154240. Its totient is φ = 1362816.

The previous prime is 3457037. The next prime is 3457049. The reversal of 3457040 is 407543.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×3457040² = 23902251123200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3456997 and 3457015.

It is not an unprimeable number, because it can be changed into a prime (3457049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6047 + ... + 6593.

It is an arithmetic number, because the mean of its divisors is an integer number (203856).

Almost surely, 2^3457040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3457040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4077120).

3457040 is an abundant number, since it is smaller than the sum of its proper divisors (4697200).

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

3457040 is a wasteful number, since it uses less digits than its factorization.

3457040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 3457040 is about 1859.3117006032. The cubic root of 3457040 is about 151.2056901827.

The spelling of 3457040 in words is "three million, four hundred fifty-seven thousand, forty".