632440819 has 4 divisors (see below), whose sum is σ = 632928240. Its totient is φ = 631953400.

The previous prime is 632440813. The next prime is 632440849. The reversal of 632440819 is 918044236.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 632440819 - 2³ = 632440811 is a prime.

It is a super-2 number, since 2×632440819² = 799962779074781522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (632440811) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 241759 + ... + 244360.

It is an arithmetic number, because the mean of its divisors is an integer number (158232060).

Almost surely, 2^632440819 is an apocalyptic number.

632440819 is a deficient number, since it is larger than the sum of its proper divisors (487421).

632440819 is a wasteful number, since it uses less digits than its factorization.

632440819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487420.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 632440819 is about 25148.3760708321. The cubic root of 632440819 is about 858.3675626613.

The spelling of 632440819 in words is "six hundred thirty-two million, four hundred forty thousand, eight hundred nineteen".