3451645840 has 40 divisors (see below), whose sum is σ = 8040576888. Its totient is φ = 1377991680.

The previous prime is 3451645817. The next prime is 3451645843. The reversal of 3451645840 is 485461543.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 362064784 + 3089581056 = 19028^2 + 55584^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 3451645793 and 3451645802.

It is not an unprimeable number, because it can be changed into a prime (3451645843) 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, 274 + ... + 83086.

Almost surely, 2^3451645840 is an apocalyptic number.

It is an amenable number.

3451645840 is an abundant number, since it is smaller than the sum of its proper divisors (4588931048).

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

3451645840 is a wasteful number, since it uses less digits than its factorization.

3451645840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83347 (or 83341 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 3451645840 is about 58750.7092723143. The cubic root of 3451645840 is about 1511.2700511565.

The spelling of 3451645840 in words is "three billion, four hundred fifty-one million, six hundred forty-five thousand, eight hundred forty".