28394737 has 16 divisors (see below), whose sum is σ = 33185152. Its totient is φ = 23794560.

The previous prime is 28394701. The next prime is 28394761. The reversal of 28394737 is 73749382.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28394737 is a prime.

It is a super-2 number, since 2×28394737² = 1612522178598338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28394693 and 28394702.

It is not an unprimeable number, because it can be changed into a prime (28394767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92338 + ... + 92644.

It is an arithmetic number, because the mean of its divisors is an integer number (2074072).

Almost surely, 2^28394737 is an apocalyptic number.

It is an amenable number.

28394737 is a deficient number, since it is larger than the sum of its proper divisors (4790415).

28394737 is a wasteful number, since it uses less digits than its factorization.

28394737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568.

The product of its digits is 254016, while the sum is 43.

The square root of 28394737 is about 5328.6712227346. The cubic root of 28394737 is about 305.0792126067.

The spelling of 28394737 in words is "twenty-eight million, three hundred ninety-four thousand, seven hundred thirty-seven".