1240022420 has 144 divisors (see below), whose sum is σ = 3291539328. Its totient is φ = 388926720.

The previous prime is 1240022401. The next prime is 1240022501. The reversal of 1240022420 is 242200421.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1668569 + ... + 1669311.

It is an arithmetic number, because the mean of its divisors is an integer number (22857912).

Almost surely, 2^1240022420 is an apocalyptic number.

1240022420 is a gapful number since it is divisible by the number (10) 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 1240022420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645769664).

1240022420 is an abundant number, since it is smaller than the sum of its proper divisors (2051516908).

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

1240022420 is a wasteful number, since it uses less digits than its factorization.

1240022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 1240022420 is about 35213.9520644872. The cubic root of 1240022420 is about 1074.3435458524.

Adding to 1240022420 its reverse (242200421), we get a palindrome (1482222841).

The spelling of 1240022420 in words is "one billion, two hundred forty million, twenty-two thousand, four hundred twenty".