61887078 has 40 divisors (see below), whose sum is σ = 151283880. Its totient is φ = 18753120.

The previous prime is 61887037. The next prime is 61887083. The reversal of 61887078 is 87078816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15583 + ... + 19146.

It is an arithmetic number, because the mean of its divisors is an integer number (3782097).

Almost surely, 2^61887078 is an apocalyptic number.

61887078 is an abundant number, since it is smaller than the sum of its proper divisors (89396802).

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

61887078 is a wasteful number, since it uses less digits than its factorization.

61887078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34754 (or 34745 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 61887078 is about 7866.8340518915. The cubic root of 61887078 is about 395.5487283618.

The spelling of 61887078 in words is "sixty-one million, eight hundred eighty-seven thousand, seventy-eight".