611771420 has 48 divisors (see below), whose sum is σ = 1400263200. Its totient is φ = 223155456.

The previous prime is 611771399. The next prime is 611771467. The reversal of 611771420 is 24177116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7406 + ... + 35754.

It is an arithmetic number, because the mean of its divisors is an integer number (29172150).

Almost surely, 2^611771420 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 611771420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700131600).

611771420 is an abundant number, since it is smaller than the sum of its proper divisors (788491780).

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

611771420 is a wasteful number, since it uses less digits than its factorization.

611771420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28454 (or 28452 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 611771420 is about 24734.0134228151. The cubic root of 611771420 is about 848.9127598398.

The spelling of 611771420 in words is "six hundred eleven million, seven hundred seventy-one thousand, four hundred twenty".