28907901 has 32 divisors (see below), whose sum is σ = 47139840. Its totient is φ = 17362800.

The previous prime is 28907897. The next prime is 28907933. The reversal of 28907901 is 10970982.

It is a happy number.

It is not a de Polignac number, because 28907901 - 2² = 28907897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28907951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38536 + ... + 39278.

It is an arithmetic number, because the mean of its divisors is an integer number (1473120).

Almost surely, 2^28907901 is an apocalyptic number.

It is an amenable number.

28907901 is a deficient number, since it is larger than the sum of its proper divisors (18231939).

28907901 is a wasteful number, since it uses less digits than its factorization.

28907901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 28907901 is about 5376.6068295906. The cubic root of 28907901 is about 306.9060993753.

The spelling of 28907901 in words is "twenty-eight million, nine hundred seven thousand, nine hundred one".