224402403978 has 12 divisors (see below), whose sum is σ = 486205208658. Its totient is φ = 74800801320.

The previous prime is 224402403971. The next prime is 224402403983. The reversal of 224402403978 is 879304204422.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 223259085009 + 1143318969 = 472503^2 + 33813^2 .

It is a super-2 number, since 2×224402403978² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (224402403971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6233400093 + ... + 6233400128.

Almost surely, 2^224402403978 is an apocalyptic number.

224402403978 is an abundant number, since it is smaller than the sum of its proper divisors (261802804680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

224402403978 is a wasteful number, since it uses less digits than its factorization.

224402403978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12466800229 (or 12466800226 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 224402403978 in words is "two hundred twenty-four billion, four hundred two million, four hundred three thousand, nine hundred seventy-eight".