428002521074 has 4 divisors (see below), whose sum is σ = 642003781614. Its totient is φ = 214001260536.

The previous prime is 428002521073. The next prime is 428002521097. The reversal of 428002521074 is 470125200824.

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., 393310851025 + 34691670049 = 627145^2 + 186257^2 .

It is a super-2 number, since 2×428002521074² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428002521071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107000630267 + ... + 107000630270.

Almost surely, 2^428002521074 is an apocalyptic number.

428002521074 is a deficient number, since it is larger than the sum of its proper divisors (214001260540).

428002521074 is a wasteful number, since it uses less digits than its factorization.

428002521074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214001260539.

The product of its (nonzero) digits is 35840, while the sum is 35.

Adding to 428002521074 its reverse (470125200824), we get a palindrome (898127721898).

The spelling of 428002521074 in words is "four hundred twenty-eight billion, two million, five hundred twenty-one thousand, seventy-four".