28855674777240 has 96 divisors (see below), whose sum is σ = 94342505755680. Its totient is φ = 7648769665536.

The previous prime is 28855674777233. The next prime is 28855674777247. The reversal of 28855674777240 is 4277747655882.

28855674777240 is a `hidden beast` number, since 2 + 8 + 8 + 55 + 67 + 477 + 7 + 2 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (28855674777233) and next prime (28855674777247).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28855674777247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239923869 + ... + 240044108.

It is an arithmetic number, because the mean of its divisors is an integer number (982734434955).

Almost surely, 2^{28855674777240} is an apocalyptic number.

28855674777240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28855674777240 is an abundant number, since it is smaller than the sum of its proper divisors (65486830978440).

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

28855674777240 is a wasteful number, since it uses less digits than its factorization.

28855674777240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479968161 (or 479968154 counting only the distinct ones).

The product of its (nonzero) digits is 1475174400, while the sum is 72.

The spelling of 28855674777240 in words is "twenty-eight trillion, eight hundred fifty-five billion, six hundred seventy-four million, seven hundred seventy-seven thousand, two hundred forty".