28623426 has 16 divisors (see below), whose sum is σ = 61650624. Its totient is φ = 8807184.

The previous prime is 28623421. The next prime is 28623449. The reversal of 28623426 is 62432682.

It is not an unprimeable number, because it can be changed into a prime (28623421) 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, 183406 + ... + 183561.

It is an arithmetic number, because the mean of its divisors is an integer number (3853164).

Almost surely, 2^28623426 is an apocalyptic number.

28623426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28623426 is an abundant number, since it is smaller than the sum of its proper divisors (33027198).

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

28623426 is a wasteful number, since it uses less digits than its factorization.

28623426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366985.

The product of its digits is 27648, while the sum is 33.

The square root of 28623426 is about 5350.0865413561. The cubic root of 28623426 is about 305.8960516678.

The spelling of 28623426 in words is "twenty-eight million, six hundred twenty-three thousand, four hundred twenty-six".