1389226256 has 20 divisors (see below), whose sum is σ = 2936319504. Its totient is φ = 631466400.

The previous prime is 1389226231. The next prime is 1389226271. The reversal of 1389226256 is 6526229831.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3946490 + ... + 3946841.

Almost surely, 2^1389226256 is an apocalyptic number.

1389226256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1389226256 is an abundant number, since it is smaller than the sum of its proper divisors (1547093248).

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

1389226256 is a wasteful number, since it uses less digits than its factorization.

1389226256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893350 (or 7893344 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 1389226256 is about 37272.3256049311. The cubic root of 1389226256 is about 1115.8119140210.

The spelling of 1389226256 in words is "one billion, three hundred eighty-nine million, two hundred twenty-six thousand, two hundred fifty-six".