28631608 has 8 divisors (see below), whose sum is σ = 53684280. Its totient is φ = 14315800.

The previous prime is 28631591. The next prime is 28631609. The reversal of 28631608 is 80613682.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1789468 + ... + 1789483.

It is an arithmetic number, because the mean of its divisors is an integer number (6710535).

Almost surely, 2^28631608 is an apocalyptic number.

It is an amenable number.

28631608 is a deficient number, since it is larger than the sum of its proper divisors (25052672).

28631608 is a wasteful number, since it uses less digits than its factorization.

28631608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578957 (or 3578953 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28631608 is about 5350.8511472475. The cubic root of 28631608 is about 305.9251956640.

The spelling of 28631608 in words is "twenty-eight million, six hundred thirty-one thousand, six hundred eight".