61234040 has 64 divisors (see below), whose sum is σ = 158146560. Its totient is φ = 20903040.

The previous prime is 61234039. The next prime is 61234123. The reversal of 61234040 is 4043216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 106955 + ... + 107525.

It is an arithmetic number, because the mean of its divisors is an integer number (2471040).

Almost surely, 2^61234040 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 61234040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79073280).

61234040 is an abundant number, since it is smaller than the sum of its proper divisors (96912520).

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

61234040 is a wasteful number, since it uses less digits than its factorization.

61234040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 61234040 is about 7825.2182078201. The cubic root of 61234040 is about 394.1525172455.

Adding to 61234040 its reverse (4043216), we get a palindrome (65277256).

The spelling of 61234040 in words is "sixty-one million, two hundred thirty-four thousand, forty".