1240400499 has 32 divisors (see below), whose sum is σ = 1877359680. Its totient is φ = 723061248.

The previous prime is 1240400407. The next prime is 1240400507. The reversal of 1240400499 is 9940040421.

It is not a de Polignac number, because 1240400499 - 2¹⁵ = 1240367731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240400899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49597 + ... + 70289.

It is an arithmetic number, because the mean of its divisors is an integer number (58667490).

Almost surely, 2^1240400499 is an apocalyptic number.

1240400499 is a deficient number, since it is larger than the sum of its proper divisors (636959181).

1240400499 is a wasteful number, since it uses less digits than its factorization.

1240400499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20791.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1240400499 is about 35219.3199678813. The cubic root of 1240400499 is about 1074.4527227652.

The spelling of 1240400499 in words is "one billion, two hundred forty million, four hundred thousand, four hundred ninety-nine".