55690078 has 8 divisors (see below), whose sum is σ = 83744640. Its totient is φ = 27775200.

The previous prime is 55690073. The next prime is 55690081. The reversal of 55690078 is 87009655.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55690078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55690073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33918 + ... + 35521.

It is an arithmetic number, because the mean of its divisors is an integer number (10468080).

Almost surely, 2^55690078 is an apocalyptic number.

55690078 is a deficient number, since it is larger than the sum of its proper divisors (28054562).

55690078 is a wasteful number, since it uses less digits than its factorization.

55690078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69842.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 55690078 is about 7462.5785087998. The cubic root of 55690078 is about 381.8791454536.

The spelling of 55690078 in words is "fifty-five million, six hundred ninety thousand, seventy-eight".