28481490 has 64 divisors (see below), whose sum is σ = 78030720. Its totient is φ = 7387200.

The previous prime is 28481489. The next prime is 28481491. The reversal of 28481490 is 9418482.

It is an interprime number because it is at equal distance from previous prime (28481489) and next prime (28481491).

It is a super-2 number, since 2×28481490² = 1622390545240200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (28481491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8565 + ... + 11415.

It is an arithmetic number, because the mean of its divisors is an integer number (1219230).

Almost surely, 2^28481490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28481490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39015360).

28481490 is an abundant number, since it is smaller than the sum of its proper divisors (49549230).

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

28481490 is a wasteful number, since it uses less digits than its factorization.

28481490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904 (or 2898 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28481490 is about 5336.8052241018. The cubic root of 28481490 is about 305.3895944054.

The spelling of 28481490 in words is "twenty-eight million, four hundred eighty-one thousand, four hundred ninety".