280206961428 has 24 divisors (see below), whose sum is σ = 688227625120. Its totient is φ = 88486408800.

The previous prime is 280206961427. The next prime is 280206961459. The reversal of 280206961428 is 824169602082.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280206961427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614488723 + ... + 614489178.

Almost surely, 2^280206961428 is an apocalyptic number.

It is an amenable number.

280206961428 is an abundant number, since it is smaller than the sum of its proper divisors (408020663692).

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

280206961428 is a wasteful number, since it uses less digits than its factorization.

280206961428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228977927 (or 1228977925 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 280206961428 in words is "two hundred eighty billion, two hundred six million, nine hundred sixty-one thousand, four hundred twenty-eight".