1398266377 has 4 divisors (see below), whose sum is σ = 1443371776. Its totient is φ = 1353160980.

The previous prime is 1398266369. The next prime is 1398266413. The reversal of 1398266377 is 7736628931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7736628931 = 66797 ⋅115823.

It is a cyclic number.

It is not a de Polignac number, because 1398266377 - 2³ = 1398266369 is a prime.

It is a super-2 number, since 2×1398266377² = 3910297722097412258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398266327) 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, 22552653 + ... + 22552714.

It is an arithmetic number, because the mean of its divisors is an integer number (360842944).

Almost surely, 2^1398266377 is an apocalyptic number.

It is an amenable number.

1398266377 is a deficient number, since it is larger than the sum of its proper divisors (45105399).

1398266377 is an equidigital number, since it uses as much as digits as its factorization.

1398266377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45105398.

The product of its digits is 2286144, while the sum is 52.

The square root of 1398266377 is about 37393.4001797109. The cubic root of 1398266377 is about 1118.2269930467.

The spelling of 1398266377 in words is "one billion, three hundred ninety-eight million, two hundred sixty-six thousand, three hundred seventy-seven".