61230440 has 32 divisors (see below), whose sum is σ = 137998080. Its totient is φ = 24451392.

The previous prime is 61230437. The next prime is 61230443. The reversal of 61230440 is 4403216.

It is a happy number.

61230440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61230437) and next prime (61230443).

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

It is not an unprimeable number, because it can be changed into a prime (61230443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37889 + ... + 39471.

It is an arithmetic number, because the mean of its divisors is an integer number (4312440).

Almost surely, 2^61230440 is an apocalyptic number.

It is an amenable number.

61230440 is an abundant number, since it is smaller than the sum of its proper divisors (76767640).

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

61230440 is a wasteful number, since it uses less digits than its factorization.

61230440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2557 counting only the distinct ones).

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

The square root of 61230440 is about 7824.9881789048. The cubic root of 61230440 is about 394.1447929096.

Adding to 61230440 its reverse (4403216), we get a palindrome (65633656).

The spelling of 61230440 in words is "sixty-one million, two hundred thirty thousand, four hundred forty".