61440628 has 12 divisors (see below), whose sum is σ = 107704800. Its totient is φ = 30667832.

The previous prime is 61440583. The next prime is 61440629. The reversal of 61440628 is 82604416.

It is a self number, because there is not a number n which added to its sum of digits gives 61440628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61440629) 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, 10426 + ... + 15217.

It is an arithmetic number, because the mean of its divisors is an integer number (8975400).

Almost surely, 2^61440628 is an apocalyptic number.

It is an amenable number.

61440628 is a deficient number, since it is larger than the sum of its proper divisors (46264172).

61440628 is a wasteful number, since it uses less digits than its factorization.

61440628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26246 (or 26244 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 61440628 is about 7838.4072361673. The cubic root of 61440628 is about 394.5952763164.

The spelling of 61440628 in words is "sixty-one million, four hundred forty thousand, six hundred twenty-eight".