1269680390 has 16 divisors (see below), whose sum is σ = 2493190800. Its totient is φ = 461701920.

The previous prime is 1269680387. The next prime is 1269680443. The reversal of 1269680390 is 930869621.

It is a super-2 number, since 2×1269680390² = 3224176585501104200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5771165 + ... + 5771384.

It is an arithmetic number, because the mean of its divisors is an integer number (155824425).

Almost surely, 2^1269680390 is an apocalyptic number.

1269680390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1269680390 is a deficient number, since it is larger than the sum of its proper divisors (1223510410).

1269680390 is a wasteful number, since it uses less digits than its factorization.

1269680390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11542567.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1269680390 is about 35632.5748438139. The cubic root of 1269680390 is about 1082.8412811318.

The spelling of 1269680390 in words is "one billion, two hundred sixty-nine million, six hundred eighty thousand, three hundred ninety".