61040628 has 126 divisors (see below), whose sum is σ = 177059442. Its totient is φ = 18390240.

The previous prime is 61040627. The next prime is 61040653. The reversal of 61040628 is 82604016.

61040628 is a `hidden beast` number, since 610 + 40 + 6 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 59629284 + 1411344 = 7722^2 + 1188^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61040627) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 352750 + ... + 352922.

Almost surely, 2^61040628 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 61040628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88529721).

61040628 is an abundant number, since it is smaller than the sum of its proper divisors (116018814).

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

61040628 is a wasteful number, since it uses less digits than its factorization.

61040628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 61040628 is about 7812.8501841517. The cubic root of 61040628 is about 393.7370934545.

The spelling of 61040628 in words is "sixty-one million, forty thousand, six hundred twenty-eight".