61402784 has 12 divisors (see below), whose sum is σ = 120886794. Its totient is φ = 30701376.

The previous prime is 61402777. The next prime is 61402787. The reversal of 61402784 is 48720416.

61402784 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., 43930384 + 17472400 = 6628^2 + 4180^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 1918837 = 61402784 / (6 + 1 + 4 + 0 + 2 + 7 + 8 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 61402784.

It is not an unprimeable number, because it can be changed into a prime (61402787) 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 as a sum of consecutive naturals, namely, 959387 + ... + 959450.

Almost surely, 2^61402784 is an apocalyptic number.

It is an amenable number.

61402784 is a deficient number, since it is larger than the sum of its proper divisors (59484010).

61402784 is a wasteful number, since it uses less digits than its factorization.

61402784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918847 (or 1918839 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 61402784 is about 7835.9928534934. The cubic root of 61402784 is about 394.5142434497.

The spelling of 61402784 in words is "sixty-one million, four hundred two thousand, seven hundred eighty-four".