61197928 has 48 divisors (see below), whose sum is σ = 127169280. Its totient is φ = 27588000.

The previous prime is 61197923. The next prime is 61197931. The reversal of 61197928 is 82979116.

It is a super-4 number, since 4×61197928⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (61197923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184723 + ... + 185053.

It is an arithmetic number, because the mean of its divisors is an integer number (2649360).

Almost surely, 2^61197928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61197928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63584640).

61197928 is an abundant number, since it is smaller than the sum of its proper divisors (65971352).

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

61197928 is a wasteful number, since it uses less digits than its factorization.

61197928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 535 counting only the distinct ones).

The product of its digits is 54432, while the sum is 43.

The square root of 61197928 is about 7822.9104558342. The cubic root of 61197928 is about 394.0750198564.

The spelling of 61197928 in words is "sixty-one million, one hundred ninety-seven thousand, nine hundred twenty-eight".