400000249 has 8 divisors (see below), whose sum is σ = 436538592. Its totient is φ = 363491040.

The previous prime is 400000193. The next prime is 400000261. The reversal of 400000249 is 942000004.

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

It is not a de Polignac number, because 400000249 - 2⁹ = 399999737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400000049) 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, 29557 + ... + 40909.

It is an arithmetic number, because the mean of its divisors is an integer number (54567324).

Almost surely, 2^400000249 is an apocalyptic number.

It is an amenable number.

400000249 is a deficient number, since it is larger than the sum of its proper divisors (36538343).

400000249 is a wasteful number, since it uses less digits than its factorization.

400000249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14567.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 400000249 is about 20000.0062249990. The cubic root of 400000249 is about 736.8064526154.

The spelling of 400000249 in words is "four hundred million, two hundred forty-nine", and thus it is an aban number.