1122402440 has 48 divisors (see below), whose sum is σ = 2567824740. Its totient is φ = 441542400.

The previous prime is 1122402439. The next prime is 1122402451. The reversal of 1122402440 is 442042211.

1122402440 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 6 ways, for example, as 13645636 + 1108756804 = 3694^2 + 33298^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145070 + ... + 152610.

Almost surely, 2^1122402440 is an apocalyptic number.

1122402440 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 1122402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283912370).

1122402440 is an abundant number, since it is smaller than the sum of its proper divisors (1445422300).

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

1122402440 is an equidigital number, since it uses as much as digits as its factorization.

1122402440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674 (or 7609 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1122402440 is about 33502.2751466225. The cubic root of 1122402440 is about 1039.2408290974.

Adding to 1122402440 its reverse (442042211), we get a palindrome (1564444651).

The spelling of 1122402440 in words is "one billion, one hundred twenty-two million, four hundred two thousand, four hundred forty".