1268993590 has 16 divisors (see below), whose sum is σ = 2313103680. Its totient is φ = 501171840.

The previous prime is 1268993573. The next prime is 1268993591. The reversal of 1268993590 is 953998621.

It is a super-2 number, since 2×1268993590² = 3220689462922176200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268993591) 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, 802371 + ... + 803950.

It is an arithmetic number, because the mean of its divisors is an integer number (144568980).

Almost surely, 2^1268993590 is an apocalyptic number.

1268993590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1268993590 is a deficient number, since it is larger than the sum of its proper divisors (1044110090).

1268993590 is a wasteful number, since it uses less digits than its factorization.

1268993590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606407.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 1268993590 is about 35622.9362911032. The cubic root of 1268993590 is about 1082.6460011406.

The spelling of 1268993590 in words is "one billion, two hundred sixty-eight million, nine hundred ninety-three thousand, five hundred ninety".