280076940 has 432 divisors, whose sum is σ = 1074318336. Its totient is φ = 60652800.

The previous prime is 280076933. The next prime is 280076947. The reversal of 280076940 is 49670082.

It is an interprime number because it is at equal distance from previous prime (280076933) and next prime (280076947).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 280076895 and 280076904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280076947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9034725 + ... + 9034755.

It is an arithmetic number, because the mean of its divisors is an integer number (2486848).

Almost surely, 2^280076940 is an apocalyptic number.

280076940 is a gapful number since it is divisible by the number (20) 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 280076940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537159168).

280076940 is an abundant number, since it is smaller than the sum of its proper divisors (794241396).

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

280076940 is a wasteful number, since it uses less digits than its factorization.

280076940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 280076940 is about 16735.4993949986. The cubic root of 280076940 is about 654.2731793694.

The spelling of 280076940 in words is "two hundred eighty million, seventy-six thousand, nine hundred forty".