28126972 has 6 divisors (see below), whose sum is σ = 49222208. Its totient is φ = 14063484.

The previous prime is 28126963. The next prime is 28126981. The reversal of 28126972 is 27962182.

It is an interprime number because it is at equal distance from previous prime (28126963) and next prime (28126981).

It is a super-2 number, since 2×28126972² = 1582253107777568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3515868 + ... + 3515875.

Almost surely, 2^28126972 is an apocalyptic number.

It is an amenable number.

28126972 is a deficient number, since it is larger than the sum of its proper divisors (21095236).

28126972 is a wasteful number, since it uses less digits than its factorization.

28126972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031747 (or 7031745 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 28126972 is about 5303.4867775832. The cubic root of 28126972 is about 304.1172072288.

The spelling of 28126972 in words is "twenty-eight million, one hundred twenty-six thousand, nine hundred seventy-two".