55402786 has 4 divisors (see below), whose sum is σ = 83104182. Its totient is φ = 27701392.

The previous prime is 55402777. The next prime is 55402799. The reversal of 55402786 is 68720455.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 10042561 = 6735^2 + 3169^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13850695 + ... + 13850698.

Almost surely, 2^55402786 is an apocalyptic number.

55402786 is a deficient number, since it is larger than the sum of its proper divisors (27701396).

55402786 is a wasteful number, since it uses less digits than its factorization.

55402786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27701395.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 55402786 is about 7443.3047767776. The cubic root of 55402786 is about 381.2213381302.

The spelling of 55402786 in words is "fifty-five million, four hundred two thousand, seven hundred eighty-six".