28401336 has 48 divisors (see below), whose sum is σ = 77182560. Its totient is φ = 9434880.

The previous prime is 28401313. The next prime is 28401341. The reversal of 28401336 is 63310482.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30721 + ... + 31631.

It is an arithmetic number, because the mean of its divisors is an integer number (1607970).

Almost surely, 2^28401336 is an apocalyptic number.

It is an amenable number.

28401336 is an abundant number, since it is smaller than the sum of its proper divisors (48781224).

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

28401336 is a wasteful number, since it uses less digits than its factorization.

28401336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1349 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 28401336 is about 5329.2903842819. The cubic root of 28401336 is about 305.1028444718.

The spelling of 28401336 in words is "twenty-eight million, four hundred one thousand, three hundred thirty-six".