428257672 has 8 divisors (see below), whose sum is σ = 802983150. Its totient is φ = 214128832.

The previous prime is 428257667. The next prime is 428257681. The reversal of 428257672 is 276752824.

It can be written as a sum of positive squares in only one way, i.e., 279759076 + 148498596 = 16726^2 + 12186^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×428257672³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26766097 + ... + 26766112.

Almost surely, 2^428257672 is an apocalyptic number.

It is an amenable number.

428257672 is a deficient number, since it is larger than the sum of its proper divisors (374725478).

428257672 is a wasteful number, since it uses less digits than its factorization.

428257672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53532215 (or 53532211 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 428257672 is about 20694.3874516739. The cubic root of 428257672 is about 753.7634082396.

The spelling of 428257672 in words is "four hundred twenty-eight million, two hundred fifty-seven thousand, six hundred seventy-two".