1390737226 has 4 divisors (see below), whose sum is σ = 2086105842. Its totient is φ = 695368612.

The previous prime is 1390737223. The next prime is 1390737233. The reversal of 1390737226 is 6227370931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1162878201 + 227859025 = 34101^2 + 15095^2 .

It is not an unprimeable number, because it can be changed into a prime (1390737223) by changing a digit.

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, 347684305 + ... + 347684308.

Almost surely, 2^1390737226 is an apocalyptic number.

1390737226 is a deficient number, since it is larger than the sum of its proper divisors (695368616).

1390737226 is an equidigital number, since it uses as much as digits as its factorization.

1390737226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695368615.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 1390737226 is about 37292.5894247101. The cubic root of 1390737226 is about 1116.2162991848.

The spelling of 1390737226 in words is "one billion, three hundred ninety million, seven hundred thirty-seven thousand, two hundred twenty-six".