1269785090 has 16 divisors (see below), whose sum is σ = 2612129472. Its totient is φ = 435354864.

The previous prime is 1269785053. The next prime is 1269785093. The reversal of 1269785090 is 905879621.

It is a super-2 number, since 2×1269785090² = 3224708349572616200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1269785093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9069824 + ... + 9069963.

It is an arithmetic number, because the mean of its divisors is an integer number (163258092).

Almost surely, 2^1269785090 is an apocalyptic number.

1269785090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1269785090 is an abundant number, since it is smaller than the sum of its proper divisors (1342344382).

1269785090 is a wasteful number, since it uses less digits than its factorization.

1269785090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18139801.

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 1269785090 is about 35634.0439748283. The cubic root of 1269785090 is about 1082.8710446237.

The spelling of 1269785090 in words is "one billion, two hundred sixty-nine million, seven hundred eighty-five thousand, ninety".