61309608 has 32 divisors (see below), whose sum is σ = 155001600. Its totient is φ = 20206208.

The previous prime is 61309597. The next prime is 61309621. The reversal of 61309608 is 80690316.

It is a super-2 number, since 2×61309608² = 7517736066227328, which contains 22 as substring.

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, 12216 + ... + 16487.

It is an arithmetic number, because the mean of its divisors is an integer number (4843800).

Almost surely, 2^61309608 is an apocalyptic number.

It is an amenable number.

61309608 is an abundant number, since it is smaller than the sum of its proper divisors (93691992).

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

61309608 is a wasteful number, since it uses less digits than its factorization.

61309608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28801 (or 28797 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 61309608 is about 7830.0452105974. The cubic root of 61309608 is about 394.3145898077.

The spelling of 61309608 in words is "sixty-one million, three hundred nine thousand, six hundred eight".