61104240 has 80 divisors (see below), whose sum is σ = 210477600. Its totient is φ = 16293888.

The previous prime is 61104229. The next prime is 61104259. The reversal of 61104240 is 4240116.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 11985 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (2630970).

Almost surely, 2^61104240 is an apocalyptic number.

61104240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61104240 is an abundant number, since it is smaller than the sum of its proper divisors (149373360).

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

61104240 is a wasteful number, since it uses less digits than its factorization.

61104240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28311 (or 28299 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 61104240 is about 7816.9201096084. The cubic root of 61104240 is about 393.8738204692.

Adding to 61104240 its reverse (4240116), we get a palindrome (65344356).

The spelling of 61104240 in words is "sixty-one million, one hundred four thousand, two hundred forty".