1390228528 has 80 divisors (see below), whose sum is σ = 3049172896. Its totient is φ = 609638400.

The previous prime is 1390228523. The next prime is 1390228529. The reversal of 1390228528 is 8258220931.

It is not an unprimeable number, because it can be changed into a prime (1390228523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328828 + ... + 333028.

Almost surely, 2^1390228528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390228528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524586448).

1390228528 is an abundant number, since it is smaller than the sum of its proper divisors (1658944368).

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

1390228528 is a wasteful number, since it uses less digits than its factorization.

1390228528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302 (or 4296 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1390228528 is about 37285.7684378370. The cubic root of 1390228528 is about 1116.0801876238.

The spelling of 1390228528 in words is "one billion, three hundred ninety million, two hundred twenty-eight thousand, five hundred twenty-eight".