61949128 has 16 divisors (see below), whose sum is σ = 116869680. Its totient is φ = 30783888.

The previous prime is 61949117. The next prime is 61949161. The reversal of 61949128 is 82194916.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22450 + ... + 25057.

It is an arithmetic number, because the mean of its divisors is an integer number (7304355).

Almost surely, 2^61949128 is an apocalyptic number.

It is an amenable number.

61949128 is a deficient number, since it is larger than the sum of its proper divisors (54920552).

61949128 is a wasteful number, since it uses less digits than its factorization.

61949128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47676 (or 47672 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 61949128 is about 7870.7768358657. The cubic root of 61949128 is about 395.6808808840.

The spelling of 61949128 in words is "sixty-one million, nine hundred forty-nine thousand, one hundred twenty-eight".