807744442 has 4 divisors (see below), whose sum is σ = 1211616666. Its totient is φ = 403872220.

The previous prime is 807744419. The next prime is 807744449. The reversal of 807744442 is 244447708.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 602653401 + 205091041 = 24549^2 + 14321^2 .

It is a junction number, because it is equal to n+sod(n) for n = 807744395 and 807744404.

It is not an unprimeable number, because it can be changed into a prime (807744449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201936109 + ... + 201936112.

Almost surely, 2^807744442 is an apocalyptic number.

807744442 is a deficient number, since it is larger than the sum of its proper divisors (403872224).

807744442 is a wasteful number, since it uses less digits than its factorization.

807744442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403872223.

The product of its (nonzero) digits is 200704, while the sum is 40.

The square root of 807744442 is about 28420.8452020696. The cubic root of 807744442 is about 931.3036951638.

The spelling of 807744442 in words is "eight hundred seven million, seven hundred forty-four thousand, four hundred forty-two".