28391454 has 48 divisors (see below), whose sum is σ = 75714912. Its totient is φ = 7487424.

The previous prime is 28391423. The next prime is 28391477. The reversal of 28391454 is 45419382.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7029 + ... + 10304.

It is an arithmetic number, because the mean of its divisors is an integer number (1577394).

Almost surely, 2^28391454 is an apocalyptic number.

28391454 is an abundant number, since it is smaller than the sum of its proper divisors (47323458).

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

28391454 is a wasteful number, since it uses less digits than its factorization.

28391454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17361 (or 17358 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28391454 is about 5328.3631632988. The cubic root of 28391454 is about 305.0674543988.

The spelling of 28391454 in words is "twenty-eight million, three hundred ninety-one thousand, four hundred fifty-four".