1397698228 has 6 divisors (see below), whose sum is σ = 2445971906. Its totient is φ = 698849112.

The previous prime is 1397698217. The next prime is 1397698283. The reversal of 1397698228 is 8228967931.

It can be written as a sum of positive squares in only one way, i.e., 1362200464 + 35497764 = 36908^2 + 5958^2 .

It is a super-4 number, since 4×1397698228⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174712275 + ... + 174712282.

Almost surely, 2^1397698228 is an apocalyptic number.

It is an amenable number.

1397698228 is a deficient number, since it is larger than the sum of its proper divisors (1048273678).

1397698228 is a wasteful number, since it uses less digits than its factorization.

1397698228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349424561 (or 349424559 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 1397698228 is about 37385.8024923901. The cubic root of 1397698228 is about 1118.0755184239.

The spelling of 1397698228 in words is "one billion, three hundred ninety-seven million, six hundred ninety-eight thousand, two hundred twenty-eight".