61606240 has 24 divisors (see below), whose sum is σ = 145545120. Its totient is φ = 24642432.

The previous prime is 61606201. The next prime is 61606243. The reversal of 61606240 is 4260616.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61606243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192360 + ... + 192679.

It is an arithmetic number, because the mean of its divisors is an integer number (6064380).

Almost surely, 2^61606240 is an apocalyptic number.

It is an amenable number.

61606240 is an abundant number, since it is smaller than the sum of its proper divisors (83938880).

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

61606240 is a wasteful number, since it uses less digits than its factorization.

61606240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385054 (or 385046 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 61606240 is about 7848.9642628821. The cubic root of 61606240 is about 394.9494994991.

Adding to 61606240 its reverse (4260616), we get a palindrome (65866856).

The spelling of 61606240 in words is "sixty-one million, six hundred six thousand, two hundred forty".