28919835 has 60 divisors (see below), whose sum is σ = 59839824. Its totient is φ = 13089600.

The previous prime is 28919831. The next prime is 28919837. The reversal of 28919835 is 53891982.

It is a happy number.

It is not a de Polignac number, because 28919835 - 2² = 28919831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (28919831) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 286285 + ... + 286385.

Almost surely, 2^28919835 is an apocalyptic number.

28919835 is an abundant number, since it is smaller than the sum of its proper divisors (30919989).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28919835 is an equidigital number, since it uses as much as digits as its factorization.

28919835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 116 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 28919835 is about 5377.7165228376. The cubic root of 28919835 is about 306.9483267407.

The spelling of 28919835 in words is "twenty-eight million, nine hundred nineteen thousand, eight hundred thirty-five".