1268602390 has 128 divisors (see below), whose sum is σ = 2764368000. Its totient is φ = 413736960.

The previous prime is 1268602381. The next prime is 1268602403. The reversal of 1268602390 is 932068621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8080192 + ... + 8080348.

It is an arithmetic number, because the mean of its divisors is an integer number (21596625).

Almost surely, 2^1268602390 is an apocalyptic number.

1268602390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1268602390 is an abundant number, since it is smaller than the sum of its proper divisors (1495765610).

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

1268602390 is a wasteful number, since it uses less digits than its factorization.

1268602390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1268602390 is about 35617.4450234713. The cubic root of 1268602390 is about 1082.5347385233.

The spelling of 1268602390 in words is "one billion, two hundred sixty-eight million, six hundred two thousand, three hundred ninety".