1275886398 has 8 divisors (see below), whose sum is σ = 2551772808. Its totient is φ = 425295464.

The previous prime is 1275886369. The next prime is 1275886399. The reversal of 1275886398 is 8936885721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1275886398 is an admirable number.

It is a super-2 number, since 2×1275886398² = 3255772201202828808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275886399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106323861 + ... + 106323872.

It is an arithmetic number, because the mean of its divisors is an integer number (318971601).

Almost surely, 2^1275886398 is an apocalyptic number.

1275886398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1275886398 is a wasteful number, since it uses less digits than its factorization.

1275886398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212647738.

The product of its digits is 5806080, while the sum is 57.

The square root of 1275886398 is about 35719.5520408641. The cubic root of 1275886398 is about 1084.6026698923.

The spelling of 1275886398 in words is "one billion, two hundred seventy-five million, eight hundred eighty-six thousand, three hundred ninety-eight".