428509154 has 4 divisors (see below), whose sum is σ = 642763734. Its totient is φ = 214254576.

The previous prime is 428509129. The next prime is 428509177. The reversal of 428509154 is 451905824.

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., 393427225 + 35081929 = 19835^2 + 5923^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107127287 + ... + 107127290.

Almost surely, 2^428509154 is an apocalyptic number.

428509154 is a deficient number, since it is larger than the sum of its proper divisors (214254580).

428509154 is a wasteful number, since it uses less digits than its factorization.

428509154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214254579.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 428509154 is about 20700.4626518346. The cubic root of 428509154 is about 753.9109213295.

The spelling of 428509154 in words is "four hundred twenty-eight million, five hundred nine thousand, one hundred fifty-four".