248640406 has 12 divisors (see below), whose sum is σ = 433852308. Its totient is φ = 106560132.

The previous prime is 248640389. The next prime is 248640433. The reversal of 248640406 is 604046842.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1268476 + ... + 1268671.

It is an arithmetic number, because the mean of its divisors is an integer number (36154359).

Almost surely, 2^248640406 is an apocalyptic number.

248640406 is a deficient number, since it is larger than the sum of its proper divisors (185211902).

248640406 is a wasteful number, since it uses less digits than its factorization.

248640406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537163 (or 2537156 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 248640406 is about 15768.3355494485. The cubic root of 248640406 is about 628.8164610844.

The spelling of 248640406 in words is "two hundred forty-eight million, six hundred forty thousand, four hundred six".