61947768 has 32 divisors (see below), whose sum is σ = 159057360. Its totient is φ = 20090880.

The previous prime is 61947749. The next prime is 61947803. The reversal of 61947768 is 86774916.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 33993 + ... + 35768.

Almost surely, 2^61947768 is an apocalyptic number.

It is an amenable number.

61947768 is an abundant number, since it is smaller than the sum of its proper divisors (97109592).

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

61947768 is a wasteful number, since it uses less digits than its factorization.

61947768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69807 (or 69803 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 61947768 is about 7870.6904398534. The cubic root of 61947768 is about 395.6779853365.

The spelling of 61947768 in words is "sixty-one million, nine hundred forty-seven thousand, seven hundred sixty-eight".