10278840 has 128 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 2296320.

The previous prime is 10278839. The next prime is 10278841. The reversal of 10278840 is 4887201.

It is an interprime number because it is at equal distance from previous prime (10278839) and next prime (10278841).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 10278798 and 10278807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10278841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16861 + ... + 17459.

It is an arithmetic number, because the mean of its divisors is an integer number (283500).

Almost surely, 2^10278840 is an apocalyptic number.

10278840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10278840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18144000).

10278840 is an abundant number, since it is smaller than the sum of its proper divisors (26009160).

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

10278840 is a wasteful number, since it uses less digits than its factorization.

10278840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 10278840 is about 3206.0630062430. The cubic root of 10278840 is about 217.4276149666.

The spelling of 10278840 in words is "ten million, two hundred seventy-eight thousand, eight hundred forty".