28288770348 has 12 divisors (see below), whose sum is σ = 66007130840. Its totient is φ = 9429590112.

The previous prime is 28288770337. The next prime is 28288770371. The reversal of 28288770348 is 84307788282.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28288770348² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1178698753 + ... + 1178698776.

Almost surely, 2^28288770348 is an apocalyptic number.

It is an amenable number.

28288770348 is an abundant number, since it is smaller than the sum of its proper divisors (37718360492).

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

28288770348 is a wasteful number, since it uses less digits than its factorization.

28288770348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357397536 (or 2357397534 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 57.

The spelling of 28288770348 in words is "twenty-eight billion, two hundred eighty-eight million, seven hundred seventy thousand, three hundred forty-eight".