1011422440 has 128 divisors (see below), whose sum is σ = 2805062400. Its totient is φ = 320440320.

The previous prime is 1011422413. The next prime is 1011422441. The reversal of 1011422440 is 442241101.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1011422441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215802 + ... + 220438.

It is an arithmetic number, because the mean of its divisors is an integer number (21914550).

Almost surely, 2^1011422440 is an apocalyptic number.

1011422440 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 1011422440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402531200).

1011422440 is an abundant number, since it is smaller than the sum of its proper divisors (1793639960).

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

1011422440 is a wasteful number, since it uses less digits than its factorization.

1011422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715 (or 4711 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1011422440 is about 31802.8684240903. The cubic root of 1011422440 is about 1003.7930743958.

Adding to 1011422440 its reverse (442241101), we get a palindrome (1453663541).

The spelling of 1011422440 in words is "one billion, eleven million, four hundred twenty-two thousand, four hundred forty".