28671434 has 24 divisors (see below), whose sum is σ = 47559204. Its totient is φ = 12953600.

The previous prime is 28671431. The next prime is 28671451. The reversal of 28671434 is 43417682.

It can be written as a sum of positive squares in 2 ways, for example, as 27071209 + 1600225 = 5203^2 + 1265^2 .

It is a super-2 number, since 2×28671434² = 1644102255232712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28671394 and 28671403.

It is not an unprimeable number, because it can be changed into a prime (28671431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61964 + ... + 62424.

Almost surely, 2^28671434 is an apocalyptic number.

28671434 is a deficient number, since it is larger than the sum of its proper divisors (18887770).

28671434 is a wasteful number, since it uses less digits than its factorization.

28671434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 731 counting only the distinct ones).

The product of its digits is 32256, while the sum is 35.

The square root of 28671434 is about 5354.5713180422. The cubic root of 28671434 is about 306.0669752440.

It can be divided in two parts, 2867 and 1434, that multiplied together give a triangular number (4111278 = T₂₈₆₇).

The spelling of 28671434 in words is "twenty-eight million, six hundred seventy-one thousand, four hundred thirty-four".