611291904 has 72 divisors (see below), whose sum is σ = 1630989360. Its totient is φ = 203255808.

The previous prime is 611291887. The next prime is 611291909. The reversal of 611291904 is 409192116.

It is not an unprimeable number, because it can be changed into a prime (611291909) 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, 427062 + ... + 428490.

It is an arithmetic number, because the mean of its divisors is an integer number (22652630).

Almost surely, 2^611291904 is an apocalyptic number.

611291904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611291904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815494680).

611291904 is an abundant number, since it is smaller than the sum of its proper divisors (1019697456).

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

611291904 is a wasteful number, since it uses less digits than its factorization.

611291904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 611291904 is about 24724.3180694635. The cubic root of 611291904 is about 848.6909048358.

The spelling of 611291904 in words is "six hundred eleven million, two hundred ninety-one thousand, nine hundred four".