611402440 has 32 divisors (see below), whose sum is σ = 1500716160. Its totient is φ = 222328000.

The previous prime is 611402417. The next prime is 611402443. The reversal of 611402440 is 44204116.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (611402443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694336 + ... + 695215.

It is an arithmetic number, because the mean of its divisors is an integer number (46897380).

Almost surely, 2^611402440 is an apocalyptic number.

It is an amenable number.

611402440 is an abundant number, since it is smaller than the sum of its proper divisors (889313720).

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

611402440 is a wasteful number, since it uses less digits than its factorization.

611402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389573 (or 1389569 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 611402440 is about 24726.5533384659. The cubic root of 611402440 is about 848.7420561997.

Adding to 611402440 its reverse (44204116), we get a palindrome (655606556).

The spelling of 611402440 in words is "six hundred eleven million, four hundred two thousand, four hundred forty".