1390205894 has 16 divisors (see below), whose sum is σ = 2599865856. Its totient is φ = 541638600.

The previous prime is 1390205863. The next prime is 1390205959. The reversal of 1390205894 is 4985020931.

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, 4513502 + ... + 4513809.

It is an arithmetic number, because the mean of its divisors is an integer number (162491616).

Almost surely, 2^1390205894 is an apocalyptic number.

1390205894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1390205894 is a deficient number, since it is larger than the sum of its proper divisors (1209659962).

1390205894 is a wasteful number, since it uses less digits than its factorization.

1390205894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9027331.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1390205894 is about 37285.4649159696. The cubic root of 1390205894 is about 1116.0741307069.

The spelling of 1390205894 in words is "one billion, three hundred ninety million, two hundred five thousand, eight hundred ninety-four".