61402188 has 12 divisors (see below), whose sum is σ = 143271800. Its totient is φ = 20467392.

The previous prime is 61402171. The next prime is 61402199. The reversal of 61402188 is 88120416.

61402188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2558413 + ... + 2558436.

Almost surely, 2^61402188 is an apocalyptic number.

It is an amenable number.

61402188 is an abundant number, since it is smaller than the sum of its proper divisors (81869612).

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

61402188 is a wasteful number, since it uses less digits than its factorization.

61402188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116856 (or 5116854 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 61402188 is about 7835.9548237595. The cubic root of 61402188 is about 394.5129670078.

The spelling of 61402188 in words is "sixty-one million, four hundred two thousand, one hundred eighty-eight".