1216146450 has 48 divisors (see below), whose sum is σ = 3036073536. Its totient is φ = 322152000.

The previous prime is 1216146431. The next prime is 1216146473. The reversal of 1216146450 is 546416121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4197 + ... + 49496.

It is an arithmetic number, because the mean of its divisors is an integer number (63251532).

Almost surely, 2^1216146450 is an apocalyptic number.

1216146450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216146450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518036768).

1216146450 is an abundant number, since it is smaller than the sum of its proper divisors (1819927086).

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

1216146450 is a wasteful number, since it uses less digits than its factorization.

1216146450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53859 (or 53854 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1216146450 is about 34873.2913559933. The cubic root of 1216146450 is about 1067.4035072667.

The spelling of 1216146450 in words is "one billion, two hundred sixteen million, one hundred forty-six thousand, four hundred fifty".