28378376456 has 8 divisors (see below), whose sum is σ = 53209455870. Its totient is φ = 14189188224.

The previous prime is 28378376413. The next prime is 28378376479. The reversal of 28378376456 is 65467387382.

It can be written as a sum of positive squares in only one way, i.e., 25335088900 + 3043287556 = 159170^2 + 55166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×28378376456³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28378376395 and 28378376404.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1773648521 + ... + 1773648536.

Almost surely, 2^28378376456 is an apocalyptic number.

It is an amenable number.

28378376456 is a deficient number, since it is larger than the sum of its proper divisors (24831079414).

28378376456 is a wasteful number, since it uses less digits than its factorization.

28378376456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547297063 (or 3547297059 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 59.

The spelling of 28378376456 in words is "twenty-eight billion, three hundred seventy-eight million, three hundred seventy-six thousand, four hundred fifty-six".