280427396 has 6 divisors (see below), whose sum is σ = 490747950. Its totient is φ = 140213696.

The previous prime is 280427363. The next prime is 280427423. The reversal of 280427396 is 693724082.

It is a happy number.

280427396 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 177688900 + 102738496 = 13330^2 + 10136^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35053421 + ... + 35053428.

It is an arithmetic number, because the mean of its divisors is an integer number (81791325).

Almost surely, 2^280427396 is an apocalyptic number.

It is an amenable number.

280427396 is a deficient number, since it is larger than the sum of its proper divisors (210320554).

280427396 is a wasteful number, since it uses less digits than its factorization.

280427396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70106853 (or 70106851 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 280427396 is about 16745.9665591449. The cubic root of 280427396 is about 654.5459596400.

The spelling of 280427396 in words is "two hundred eighty million, four hundred twenty-seven thousand, three hundred ninety-six".