28448658 has 40 divisors (see below), whose sum is σ = 72855552. Its totient is φ = 8127864.

The previous prime is 28448657. The next prime is 28448659. The reversal of 28448658 is 85684482.

It is an interprime number because it is at equal distance from previous prime (28448657) and next prime (28448659).

It is a super-2 number, since 2×28448658² = 1618652284001928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28448653) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11410 + ... + 13677.

Almost surely, 2^28448658 is an apocalyptic number.

28448658 is an abundant number, since it is smaller than the sum of its proper divisors (44406894).

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

28448658 is a wasteful number, since it uses less digits than its factorization.

28448658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25108 (or 25099 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 28448658 is about 5333.7283395389. The cubic root of 28448658 is about 305.2722034692.

The spelling of 28448658 in words is "twenty-eight million, four hundred forty-eight thousand, six hundred fifty-eight".