454742978 has 4 divisors (see below), whose sum is σ = 682114470. Its totient is φ = 227371488.

The previous prime is 454742957. The next prime is 454743007. The reversal of 454742978 is 879247454.

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., 452966089 + 1776889 = 21283^2 + 1333^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113685743 + ... + 113685746.

Almost surely, 2^454742978 is an apocalyptic number.

454742978 is a deficient number, since it is larger than the sum of its proper divisors (227371492).

454742978 is a wasteful number, since it uses less digits than its factorization.

454742978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227371491.

The product of its digits is 2257920, while the sum is 50.

The square root of 454742978 is about 21324.7034680438. The cubic root of 454742978 is about 768.9923165172.

The spelling of 454742978 in words is "four hundred fifty-four million, seven hundred forty-two thousand, nine hundred seventy-eight".