61887402 has 20 divisors (see below), whose sum is σ = 138673986. Its totient is φ = 20629080.

The previous prime is 61887383. The next prime is 61887403. The reversal of 61887402 is 20478816.

61887402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 53012961 + 8874441 = 7281^2 + 2979^2 .

It is not an unprimeable number, because it can be changed into a prime (61887403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 190849 + ... + 191172.

Almost surely, 2^61887402 is an apocalyptic number.

61887402 is an abundant number, since it is smaller than the sum of its proper divisors (76786584).

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

61887402 is a wasteful number, since it uses less digits than its factorization.

61887402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382035 (or 382026 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 61887402 is about 7866.8546446467. The cubic root of 61887402 is about 395.5494186382.

The spelling of 61887402 in words is "sixty-one million, eight hundred eighty-seven thousand, four hundred two".