550009978 has 8 divisors (see below), whose sum is σ = 942874272. Its totient is φ = 235718556.

The previous prime is 550009973. The next prime is 550009979. The reversal of 550009978 is 879900055.

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

It is not an unprimeable number, because it can be changed into a prime (550009973) 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, 19643200 + ... + 19643227.

It is an arithmetic number, because the mean of its divisors is an integer number (117859284).

Almost surely, 2^550009978 is an apocalyptic number.

550009978 is a deficient number, since it is larger than the sum of its proper divisors (392864294).

550009978 is a wasteful number, since it uses less digits than its factorization.

550009978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39286436.

The product of its (nonzero) digits is 113400, while the sum is 43.

The square root of 550009978 is about 23452.2915298271. The cubic root of 550009978 is about 819.3262252299.

The spelling of 550009978 in words is "five hundred fifty million, nine thousand, nine hundred seventy-eight".