406248442 has 4 divisors (see below), whose sum is σ = 609372666. Its totient is φ = 203124220.

The previous prime is 406248433. The next prime is 406248449. The reversal of 406248442 is 244842604.

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., 307265841 + 98982601 = 17529^2 + 9949^2 .

It is a junction number, because it is equal to n+sod(n) for n = 406248398 and 406248407.

It is not an unprimeable number, because it can be changed into a prime (406248449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101562109 + ... + 101562112.

Almost surely, 2^406248442 is an apocalyptic number.

406248442 is a deficient number, since it is larger than the sum of its proper divisors (203124224).

406248442 is a wasteful number, since it uses less digits than its factorization.

406248442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203124223.

The product of its (nonzero) digits is 49152, while the sum is 34.

The square root of 406248442 is about 20155.6057214860. The cubic root of 406248442 is about 740.6230703173.

The spelling of 406248442 in words is "four hundred six million, two hundred forty-eight thousand, four hundred forty-two".