61617428 has 6 divisors (see below), whose sum is σ = 107830506. Its totient is φ = 30808712.

The previous prime is 61617427. The next prime is 61617467. The reversal of 61617428 is 82471616.

It can be written as a sum of positive squares in only one way, i.e., 61434244 + 183184 = 7838^2 + 428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61617427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7702175 + ... + 7702182.

It is an arithmetic number, because the mean of its divisors is an integer number (17971751).

Almost surely, 2^61617428 is an apocalyptic number.

It is an amenable number.

61617428 is a deficient number, since it is larger than the sum of its proper divisors (46213078).

61617428 is a wasteful number, since it uses less digits than its factorization.

61617428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15404361 (or 15404359 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 61617428 is about 7849.6769360274. The cubic root of 61617428 is about 394.9734063173.

The spelling of 61617428 in words is "sixty-one million, six hundred seventeen thousand, four hundred twenty-eight".