27802453428 has 18 divisors (see below), whose sum is σ = 70278424034. Its totient is φ = 9267484464.

The previous prime is 27802453387. The next prime is 27802453501. The reversal of 27802453428 is 82435420872.

27802453428 is a `hidden beast` number, since 2 + 78 + 0 + 24 + 534 + 28 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24190203024 + 3612250404 = 155532^2 + 60102^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×27802453428² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 386145151 + ... + 386145222.

Almost surely, 2^27802453428 is an apocalyptic number.

It is an amenable number.

27802453428 is an abundant number, since it is smaller than the sum of its proper divisors (42475970606).

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

27802453428 is a wasteful number, since it uses less digits than its factorization.

27802453428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772290383 (or 772290378 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 27802453428 in words is "twenty-seven billion, eight hundred two million, four hundred fifty-three thousand, four hundred twenty-eight".