61097928 has 32 divisors (see below), whose sum is σ = 152937600. Its totient is φ = 20340288.

The previous prime is 61097921. The next prime is 61097929. The reversal of 61097928 is 82979016.

It is a self number, because there is not a number n which added to its sum of digits gives 61097928.

It is not an unprimeable number, because it can be changed into a prime (61097921) 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, 33258 + ... + 35046.

It is an arithmetic number, because the mean of its divisors is an integer number (4779300).

Almost surely, 2^61097928 is an apocalyptic number.

It is an amenable number.

61097928 is an abundant number, since it is smaller than the sum of its proper divisors (91839672).

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

61097928 is a wasteful number, since it uses less digits than its factorization.

61097928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 61097928 is about 7816.5163596068. The cubic root of 61097928 is about 393.8602577597.

The spelling of 61097928 in words is "sixty-one million, ninety-seven thousand, nine hundred twenty-eight".