55302778 has 8 divisors (see below), whose sum is σ = 83194272. Its totient is φ = 27571356.

The previous prime is 55302763. The next prime is 55302781. The reversal of 55302778 is 87720355.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39150 + ... + 40537.

It is an arithmetic number, because the mean of its divisors is an integer number (10399284).

Almost surely, 2^55302778 is an apocalyptic number.

55302778 is a deficient number, since it is larger than the sum of its proper divisors (27891494).

55302778 is a wasteful number, since it uses less digits than its factorization.

55302778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80036.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 55302778 is about 7436.5837586892. The cubic root of 55302778 is about 380.9918181042.

The spelling of 55302778 in words is "fifty-five million, three hundred two thousand, seven hundred seventy-eight".