1240400451330 has 48 divisors (see below), whose sum is σ = 3225557083320. Its totient is φ = 330720539904.

The previous prime is 1240400451299. The next prime is 1240400451337. The reversal of 1240400451330 is 331540040421.

It is a happy number.

1240400451330 is a `hidden beast` number, since 1 + 240 + 40 + 0 + 4 + 51 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 470325754809 + 770074696521 = 685803^2 + 877539^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1240400451294 and 1240400451303.

It is not an unprimeable number, because it can be changed into a prime (1240400451337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 535027 + ... + 1663446.

Almost surely, 2^{1240400451330} is an apocalyptic number.

1240400451330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240400451330 is an abundant number, since it is smaller than the sum of its proper divisors (1985156631990).

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

1240400451330 is a wasteful number, since it uses less digits than its factorization.

1240400451330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204755 (or 2204752 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 1240400451330 its reverse (331540040421), we get a palindrome (1571940491751).

The spelling of 1240400451330 in words is "one trillion, two hundred forty billion, four hundred million, four hundred fifty-one thousand, three hundred thirty".