28426818 has 16 divisors (see below), whose sum is σ = 64975680. Its totient is φ = 8121936.

The previous prime is 28426813. The next prime is 28426819. The reversal of 28426818 is 81862482.

It is not an unprimeable number, because it can be changed into a prime (28426813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338373 + ... + 338456.

It is an arithmetic number, because the mean of its divisors is an integer number (4060980).

Almost surely, 2^28426818 is an apocalyptic number.

28426818 is an abundant number, since it is smaller than the sum of its proper divisors (36548862).

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

28426818 is a wasteful number, since it uses less digits than its factorization.

28426818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676841.

The product of its digits is 49152, while the sum is 39.

The square root of 28426818 is about 5331.6805980854. The cubic root of 28426818 is about 305.1940644374.

The spelling of 28426818 in words is "twenty-eight million, four hundred twenty-six thousand, eight hundred eighteen".