1240400493 has 16 divisors (see below), whose sum is σ = 1855828800. Its totient is φ = 818744400.

The previous prime is 1240400407. The next prime is 1240400507. The reversal of 1240400493 is 3940040421.

1240400493 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 1240400493 - 2⁹ = 1240399981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240400893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224703 + ... + 230156.

It is an arithmetic number, because the mean of its divisors is an integer number (115989300).

Almost surely, 2^1240400493 is an apocalyptic number.

It is an amenable number.

1240400493 is a deficient number, since it is larger than the sum of its proper divisors (615428307).

1240400493 is a wasteful number, since it uses less digits than its factorization.

1240400493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454969 (or 454963 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1240400493 is about 35219.3198827007. The cubic root of 1240400493 is about 1074.4527210327.

The spelling of 1240400493 in words is "one billion, two hundred forty million, four hundred thousand, four hundred ninety-three".