611672840 has 32 divisors (see below), whose sum is σ = 1395123480. Its totient is φ = 241316352.

The previous prime is 611672839. The next prime is 611672849. The reversal of 611672840 is 48276116.

It can be written as a sum of positive squares in 4 ways, for example, as 527437156 + 84235684 = 22966^2 + 9178^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 611672840.

It is not an unprimeable number, because it can be changed into a prime (611672849) 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, 101819 + ... + 107658.

Almost surely, 2^611672840 is an apocalyptic number.

It is an amenable number.

611672840 is an abundant number, since it is smaller than the sum of its proper divisors (783450640).

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

611672840 is a wasteful number, since it uses less digits than its factorization.

611672840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209561 (or 209557 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 611672840 is about 24732.0205401823. The cubic root of 611672840 is about 848.8671598480.

The spelling of 611672840 in words is "six hundred eleven million, six hundred seventy-two thousand, eight hundred forty".