611504740 has 96 divisors (see below), whose sum is σ = 1685376000. Its totient is φ = 180558720.

The previous prime is 611504737. The next prime is 611504801. The reversal of 611504740 is 47405116.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 611504699 and 611504708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18811 + ... + 39709.

It is an arithmetic number, because the mean of its divisors is an integer number (17556000).

Almost surely, 2^611504740 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 611504740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (842688000).

611504740 is an abundant number, since it is smaller than the sum of its proper divisors (1073871260).

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

611504740 is a wasteful number, since it uses less digits than its factorization.

611504740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20945 (or 20943 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 611504740 is about 24728.6218783013. The cubic root of 611504740 is about 848.7893908000.

Adding to 611504740 its reverse (47405116), we get a palindrome (658909856).

The spelling of 611504740 in words is "six hundred eleven million, five hundred four thousand, seven hundred forty".