400002499 has 8 divisors (see below), whose sum is σ = 449501472. Its totient is φ = 353179200.

The previous prime is 400002461. The next prime is 400002509. The reversal of 400002499 is 994200004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400002499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400000499) 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, 668602 + ... + 669199.

It is an arithmetic number, because the mean of its divisors is an integer number (56187684).

Almost surely, 2^400002499 is an apocalyptic number.

400002499 is a deficient number, since it is larger than the sum of its proper divisors (49498973).

400002499 is a wasteful number, since it uses less digits than its factorization.

400002499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337837.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 400002499 is about 20000.0624749024. The cubic root of 400002499 is about 736.8078341240.

The spelling of 400002499 in words is "four hundred million, two thousand, four hundred ninety-nine".