28294001520 has 40 divisors (see below), whose sum is σ = 87711405456. Its totient is φ = 7545067008.

The previous prime is 28294001507. The next prime is 28294001521. The reversal of 28294001520 is 2510049282.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×28294001520³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28294001521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58945597 + ... + 58946076.

Almost surely, 2^28294001520 is an apocalyptic number.

28294001520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28294001520 is an abundant number, since it is smaller than the sum of its proper divisors (59417403936).

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

28294001520 is a wasteful number, since it uses less digits than its factorization.

28294001520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117891689 (or 117891683 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 28294001520 in words is "twenty-eight billion, two hundred ninety-four million, one thousand, five hundred twenty".