1390220436 has 24 divisors (see below), whose sum is σ = 3538743264. Its totient is φ = 421278880.

The previous prime is 1390220417. The next prime is 1390220437. The reversal of 1390220436 is 6340220931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390220437) 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, 5265855 + ... + 5266118.

It is an arithmetic number, because the mean of its divisors is an integer number (147447636).

Almost surely, 2^1390220436 is an apocalyptic number.

It is an amenable number.

1390220436 is an abundant number, since it is smaller than the sum of its proper divisors (2148522828).

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

1390220436 is a wasteful number, since it uses less digits than its factorization.

1390220436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531991 (or 10531989 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1390220436 is about 37285.6599244267. The cubic root of 1390220436 is about 1116.0780221913.

The spelling of 1390220436 in words is "one billion, three hundred ninety million, two hundred twenty thousand, four hundred thirty-six".