1220742824 has 64 divisors (see below), whose sum is σ = 2694595200. Its totient is φ = 507596544.

The previous prime is 1220742823. The next prime is 1220742833. The reversal of 1220742824 is 4282470221.

It is not an unprimeable number, because it can be changed into a prime (1220742823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376442 + ... + 379670.

It is an arithmetic number, because the mean of its divisors is an integer number (42103050).

Almost surely, 2^1220742824 is an apocalyptic number.

1220742824 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220742824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347297600).

1220742824 is an abundant number, since it is smaller than the sum of its proper divisors (1473852376).

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

1220742824 is a wasteful number, since it uses less digits than its factorization.

1220742824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3438 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 1220742824 is about 34939.1302696561. The cubic root of 1220742824 is about 1068.7465521405.

The spelling of 1220742824 in words is "one billion, two hundred twenty million, seven hundred forty-two thousand, eight hundred twenty-four".