1240531404 has 96 divisors (see below), whose sum is σ = 3510743040. Its totient is φ = 333250368.

The previous prime is 1240531403. The next prime is 1240531421. The reversal of 1240531404 is 4041350421.

It is a super-2 number, since 2×1240531404² = 3077836328620422432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1240531403) 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, 108547 + ... + 119429.

It is an arithmetic number, because the mean of its divisors is an integer number (36570240).

Almost surely, 2^1240531404 is an apocalyptic number.

1240531404 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 1240531404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755371520).

1240531404 is an abundant number, since it is smaller than the sum of its proper divisors (2270211636).

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

1240531404 is a wasteful number, since it uses less digits than its factorization.

1240531404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10979 (or 10977 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1240531404 is about 35221.1783448538. The cubic root of 1240531404 is about 1074.4905186992.

Adding to 1240531404 its reverse (4041350421), we get a palindrome (5281881825).

The spelling of 1240531404 in words is "one billion, two hundred forty million, five hundred thirty-one thousand, four hundred four".