1216447044 has 48 divisors (see below), whose sum is σ = 2904803328. Its totient is φ = 396029088.

The previous prime is 1216447031. The next prime is 1216447061. The reversal of 1216447044 is 4407446121.

It is a junction number, because it is equal to n+sod(n) for n = 1216446996 and 1216447014.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306537 + ... + 310479.

It is an arithmetic number, because the mean of its divisors is an integer number (60516736).

Almost surely, 2^1216447044 is an apocalyptic number.

It is an amenable number.

1216447044 is an abundant number, since it is smaller than the sum of its proper divisors (1688356284).

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

1216447044 is a wasteful number, since it uses less digits than its factorization.

1216447044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544 (or 4542 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 1216447044 is about 34877.6008922632. The cubic root of 1216447044 is about 1067.4914431284.

The spelling of 1216447044 in words is "one billion, two hundred sixteen million, four hundred forty-seven thousand, forty-four".