28400925826839 has 16 divisors (see below), whose sum is σ = 39272365127520. Its totient is φ = 18235007683200.

The previous prime is 28400925826787. The next prime is 28400925826907. The reversal of 28400925826839 is 93862852900482.

It is not a de Polignac number, because 28400925826839 - 2¹³ = 28400925818647 is a prime.

It is a super-2 number, since 2×28400925826839² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28400925826839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28400925876839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411108312 + ... + 411177389.

It is an arithmetic number, because the mean of its divisors is an integer number (2454522820470).

Almost surely, 2^{28400925826839} is an apocalyptic number.

28400925826839 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28400925826839 is a deficient number, since it is larger than the sum of its proper divisors (10871439300681).

28400925826839 is a wasteful number, since it uses less digits than its factorization.

28400925826839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822286130.

The product of its (nonzero) digits is 119439360, while the sum is 66.

The spelling of 28400925826839 in words is "twenty-eight trillion, four hundred billion, nine hundred twenty-five million, eight hundred twenty-six thousand, eight hundred thirty-nine".