61121228 has 24 divisors (see below), whose sum is σ = 124740000. Its totient is φ = 26194224.

The previous prime is 61121209. The next prime is 61121279. The reversal of 61121228 is 82212116.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20903 + ... + 23646.

It is an arithmetic number, because the mean of its divisors is an integer number (5197500).

Almost surely, 2^61121228 is an apocalyptic number.

It is an amenable number.

61121228 is an abundant number, since it is smaller than the sum of its proper divisors (63618772).

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

61121228 is a wasteful number, since it uses less digits than its factorization.

61121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44574 (or 44558 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 61121228 is about 7818.0066513146. The cubic root of 61121228 is about 393.9103182555.

The spelling of 61121228 in words is "sixty-one million, one hundred twenty-one thousand, two hundred twenty-eight".