494578442 has 4 divisors (see below), whose sum is σ = 741867666. Its totient is φ = 247289220.

The previous prime is 494578421. The next prime is 494578451. The reversal of 494578442 is 244875494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244875494 = 2 ⋅122437747.

It can be written as a sum of positive squares in only one way, i.e., 480881041 + 13697401 = 21929^2 + 3701^2 .

It is a super-2 number, since 2×494578442² = 489215670582294728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123644609 + ... + 123644612.

Almost surely, 2^494578442 is an apocalyptic number.

494578442 is a deficient number, since it is larger than the sum of its proper divisors (247289224).

494578442 is a wasteful number, since it uses less digits than its factorization.

494578442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247289223.

The product of its digits is 1290240, while the sum is 47.

The square root of 494578442 is about 22239.1196318559. The cubic root of 494578442 is about 790.8213654576.

The spelling of 494578442 in words is "four hundred ninety-four million, five hundred seventy-eight thousand, four hundred forty-two".