28087206957880 has 64 divisors (see below), whose sum is σ = 73760932592640. Its totient is φ = 9425008044672.

The previous prime is 28087206957871. The next prime is 28087206957889. The reversal of 28087206957880 is 8875960278082.

It is an interprime number because it is at equal distance from previous prime (28087206957871) and next prime (28087206957889).

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28087206957889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1067129962 + ... + 1067156281.

It is an arithmetic number, because the mean of its divisors is an integer number (1152514571760).

Almost surely, 2^{28087206957880} is an apocalyptic number.

28087206957880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28087206957880 is an abundant number, since it is smaller than the sum of its proper divisors (45673725634760).

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

28087206957880 is a wasteful number, since it uses less digits than its factorization.

28087206957880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134286308 (or 2134286304 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 70.

The spelling of 28087206957880 in words is "twenty-eight trillion, eighty-seven billion, two hundred six million, nine hundred fifty-seven thousand, eight hundred eighty".