280078425 has 96 divisors (see below), whose sum is σ = 570677760. Its totient is φ = 133531200.

The previous prime is 280078387. The next prime is 280078441. The reversal of 280078425 is 524870082.

It is a happy number.

It is not a de Polignac number, because 280078425 - 2⁹ = 280077913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280078425.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 497194 + ... + 497756.

It is an arithmetic number, because the mean of its divisors is an integer number (5944560).

Almost surely, 2^280078425 is an apocalyptic number.

280078425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280078425 is an abundant number, since it is smaller than the sum of its proper divisors (290599335).

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

280078425 is a wasteful number, since it uses less digits than its factorization.

280078425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 280078425 is about 16735.5437617067. The cubic root of 280078425 is about 654.2743357111.

It can be divided in two parts, 2800 and 78425, that added together give a square (81225 = 285²).

The spelling of 280078425 in words is "two hundred eighty million, seventy-eight thousand, four hundred twenty-five".