61836728 has 8 divisors (see below), whose sum is σ = 115943880. Its totient is φ = 30918360.

The previous prime is 61836727. The next prime is 61836739. The reversal of 61836728 is 82763816.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61836721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864788 + ... + 3864803.

It is an arithmetic number, because the mean of its divisors is an integer number (14492985).

Almost surely, 2^61836728 is an apocalyptic number.

It is an amenable number.

61836728 is a deficient number, since it is larger than the sum of its proper divisors (54107152).

61836728 is a wasteful number, since it uses less digits than its factorization.

61836728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7729597 (or 7729593 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 61836728 is about 7863.6332569621. The cubic root of 61836728 is about 395.4414292691.

The spelling of 61836728 in words is "sixty-one million, eight hundred thirty-six thousand, seven hundred twenty-eight".