28967788 has 6 divisors (see below), whose sum is σ = 50693636. Its totient is φ = 14483892.

The previous prime is 28967773. The next prime is 28967801. The reversal of 28967788 is 88776982.

It is a super-2 number, since 2×28967788² = 1678265483225888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3620970 + ... + 3620977.

Almost surely, 2^28967788 is an apocalyptic number.

It is an amenable number.

28967788 is a deficient number, since it is larger than the sum of its proper divisors (21725848).

28967788 is a wasteful number, since it uses less digits than its factorization.

28967788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241951 (or 7241949 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 55.

The square root of 28967788 is about 5382.1731670395. The cubic root of 28967788 is about 307.1178870117.

The spelling of 28967788 in words is "twenty-eight million, nine hundred sixty-seven thousand, seven hundred eighty-eight".