1390228548 has 12 divisors (see below), whose sum is σ = 3243866640. Its totient is φ = 463409512.

The previous prime is 1390228547. The next prime is 1390228579. The reversal of 1390228548 is 8458220931.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1390228547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57926178 + ... + 57926201.

It is an arithmetic number, because the mean of its divisors is an integer number (270322220).

Almost surely, 2^1390228548 is an apocalyptic number.

It is an amenable number.

1390228548 is an abundant number, since it is smaller than the sum of its proper divisors (1853638092).

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

1390228548 is a wasteful number, since it uses less digits than its factorization.

1390228548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115852386 (or 115852384 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 1390228548 is about 37285.7687060358. The cubic root of 1390228548 is about 1116.0801929758.

The spelling of 1390228548 in words is "one billion, three hundred ninety million, two hundred twenty-eight thousand, five hundred forty-eight".