28402781490 has 64 divisors (see below), whose sum is σ = 75755548800. Its totient is φ = 7572595392.

The previous prime is 28402781471. The next prime is 28402781507. The reversal of 28402781490 is 9418720482.

28402781490 is a `hidden beast` number, since 2 + 84 + 0 + 2 + 7 + 81 + 490 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2598156 + ... + 2609064.

It is an arithmetic number, because the mean of its divisors is an integer number (1183680450).

Almost surely, 2^28402781490 is an apocalyptic number.

28402781490 is an abundant number, since it is smaller than the sum of its proper divisors (47352767310).

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

28402781490 is a wasteful number, since it uses less digits than its factorization.

28402781490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20568 (or 20562 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 28402781490 in words is "twenty-eight billion, four hundred two million, seven hundred eighty-one thousand, four hundred ninety".