1240400487 has 8 divisors (see below), whose sum is σ = 1655617536. Its totient is φ = 826058552.

The previous prime is 1240400407. The next prime is 1240400507. The reversal of 1240400487 is 7840040421.

1240400487 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240400487 - 2¹⁰ = 1240399463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240400407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215463 + ... + 221144.

It is an arithmetic number, because the mean of its divisors is an integer number (206952192).

Almost surely, 2^1240400487 is an apocalyptic number.

1240400487 is a deficient number, since it is larger than the sum of its proper divisors (415217049).

1240400487 is an equidigital number, since it uses as much as digits as its factorization.

1240400487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437557.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 1240400487 is about 35219.3197975202. The cubic root of 1240400487 is about 1074.4527193003.

The spelling of 1240400487 in words is "one billion, two hundred forty million, four hundred thousand, four hundred eighty-seven".