1398897445 has 32 divisors (see below), whose sum is σ = 1970873856. Its totient is φ = 941798400.

The previous prime is 1398897433. The next prime is 1398897449. The reversal of 1398897445 is 5447988931.

It is not a de Polignac number, because 1398897445 - 2¹³ = 1398889253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398897445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398897449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44772 + ... + 69298.

It is an arithmetic number, because the mean of its divisors is an integer number (61589808).

Almost surely, 2^1398897445 is an apocalyptic number.

It is an amenable number.

1398897445 is a deficient number, since it is larger than the sum of its proper divisors (571976411).

1398897445 is a wasteful number, since it uses less digits than its factorization.

1398897445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24621.

The product of its digits is 8709120, while the sum is 58.

The square root of 1398897445 is about 37401.8374548631. The cubic root of 1398897445 is about 1118.3951944585.

The spelling of 1398897445 in words is "one billion, three hundred ninety-eight million, eight hundred ninety-seven thousand, four hundred forty-five".