61697928 has 32 divisors (see below), whose sum is σ = 154899360. Its totient is φ = 20478720.

The previous prime is 61697903. The next prime is 61697929. The reversal of 61697928 is 82979616.

It is not an unprimeable number, because it can be changed into a prime (61697929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451 + ... + 11117.

It is an arithmetic number, because the mean of its divisors is an integer number (4840605).

Almost surely, 2^61697928 is an apocalyptic number.

It is an amenable number.

61697928 is an abundant number, since it is smaller than the sum of its proper divisors (93201432).

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

61697928 is a wasteful number, since it uses less digits than its factorization.

61697928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10917 (or 10913 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 61697928 is about 7854.8028619438. The cubic root of 61697928 is about 395.1453356125.

The spelling of 61697928 in words is "sixty-one million, six hundred ninety-seven thousand, nine hundred twenty-eight".