1398861420 has 48 divisors (see below), whose sum is σ = 4272887808. Its totient is φ = 339117760.

The previous prime is 1398861407. The next prime is 1398861421. The reversal of 1398861420 is 241688931.

1398861420 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1398861421) 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, 1059084 + ... + 1060403.

It is an arithmetic number, because the mean of its divisors is an integer number (89018496).

Almost surely, 2^1398861420 is an apocalyptic number.

1398861420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1398861420 is an abundant number, since it is smaller than the sum of its proper divisors (2874026388).

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

1398861420 is a wasteful number, since it uses less digits than its factorization.

1398861420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119510 (or 2119508 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1398861420 is about 37401.3558577761. The cubic root of 1398861420 is about 1118.3855939137.

The spelling of 1398861420 in words is "one billion, three hundred ninety-eight million, eight hundred sixty-one thousand, four hundred twenty".