1240400235 has 16 divisors (see below), whose sum is σ = 2070929664. Its totient is φ = 632783712.

The previous prime is 1240400197. The next prime is 1240400297. The reversal of 1240400235 is 5320040421.

1240400235 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1240400235 - 2²⁴ = 1223623019 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797337 + ... + 1798026.

It is an arithmetic number, because the mean of its divisors is an integer number (129433104).

Almost surely, 2^1240400235 is an apocalyptic number.

1240400235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1240400235 is a deficient number, since it is larger than the sum of its proper divisors (830529429).

1240400235 is a wasteful number, since it uses less digits than its factorization.

1240400235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595394.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 1240400235 is about 35219.3162199382. The cubic root of 1240400235 is about 1074.4526465383.

Adding to 1240400235 its reverse (5320040421), we get a palindrome (6560440656).

The spelling of 1240400235 in words is "one billion, two hundred forty million, four hundred thousand, two hundred thirty-five".