61216928 has 24 divisors (see below), whose sum is σ = 120736980. Its totient is φ = 30553600.

The previous prime is 61216927. The next prime is 61216933. The reversal of 61216928 is 82961216.

It can be written as a sum of positive squares in 2 ways, for example, as 47169424 + 14047504 = 6868^2 + 3748^2 .

It is not an unprimeable number, because it can be changed into a prime (61216927) 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, 21068 + ... + 23796.

Almost surely, 2^61216928 is an apocalyptic number.

It is an amenable number.

61216928 is a deficient number, since it is larger than the sum of its proper divisors (59520052).

61216928 is a wasteful number, since it uses less digits than its factorization.

61216928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440 (or 3432 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 61216928 is about 7824.1247433818. The cubic root of 61216928 is about 394.1157982013.

The spelling of 61216928 in words is "sixty-one million, two hundred sixteen thousand, nine hundred twenty-eight".