61528005 has 80 divisors (see below), whose sum is σ = 137579904. Its totient is φ = 25557120.

The previous prime is 61527989. The next prime is 61528007. The reversal of 61528005 is 50082516.

It is not a de Polignac number, because 61528005 - 2⁴ = 61527989 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61528005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61528007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 30199 + ... + 32171.

Almost surely, 2^61528005 is an apocalyptic number.

It is an amenable number.

61528005 is an abundant number, since it is smaller than the sum of its proper divisors (76051899).

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

61528005 is a wasteful number, since it uses less digits than its factorization.

61528005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 1999 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 61528005 is about 7843.9789010425. The cubic root of 61528005 is about 394.7822439146.

The spelling of 61528005 in words is "sixty-one million, five hundred twenty-eight thousand, five".