28874085390 has 40 divisors (see below), whose sum is σ = 77639209560. Its totient is φ = 7699755888.

The previous prime is 28874085371. The next prime is 28874085469. The reversal of 28874085390 is 9358047882.

It is a happy number.

28874085390 is a `hidden beast` number, since 28 + 87 + 4 + 0 + 8 + 539 + 0 = 666.

It is a super-2 number, since 2×28874085390² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17822700 + ... + 17824319.

It is an arithmetic number, because the mean of its divisors is an integer number (1940980239).

Almost surely, 2^28874085390 is an apocalyptic number.

28874085390 is an abundant number, since it is smaller than the sum of its proper divisors (48765124170).

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

28874085390 is a wasteful number, since it uses less digits than its factorization.

28874085390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35647038 (or 35647029 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 28874085390 in words is "twenty-eight billion, eight hundred seventy-four million, eighty-five thousand, three hundred ninety".