440242157 has 2 divisors, whose sum is σ = 440242158. Its totient is φ = 440242156.

The previous prime is 440242123. The next prime is 440242219. The reversal of 440242157 is 751242044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 253892356 + 186349801 = 15934^2 + 13651^2 .

It is a cyclic number.

It is not a de Polignac number, because 440242157 - 2¹⁶ = 440176621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440242657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220121078 + 220121079.

It is an arithmetic number, because the mean of its divisors is an integer number (220121079).

Almost surely, 2^440242157 is an apocalyptic number.

It is an amenable number.

440242157 is a deficient number, since it is larger than the sum of its proper divisors (1).

440242157 is an equidigital number, since it uses as much as digits as its factorization.

440242157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 440242157 is about 20981.9483604359. The cubic root of 440242157 is about 760.7299986170.

The spelling of 440242157 in words is "four hundred forty million, two hundred forty-two thousand, one hundred fifty-seven".