28346388 has 24 divisors (see below), whose sum is σ = 75590592. Its totient is φ = 8098944.

The previous prime is 28346387. The next prime is 28346393. The reversal of 28346388 is 88364382.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28346387) 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, 168645 + ... + 168812.

It is an arithmetic number, because the mean of its divisors is an integer number (3149608).

Almost surely, 2^28346388 is an apocalyptic number.

28346388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28346388 is an abundant number, since it is smaller than the sum of its proper divisors (47244204).

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

28346388 is a wasteful number, since it uses less digits than its factorization.

28346388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337471 (or 337469 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 28346388 is about 5324.1326054110. The cubic root of 28346388 is about 304.9059568520.

The spelling of 28346388 in words is "twenty-eight million, three hundred forty-six thousand, three hundred eighty-eight".