1389429420 has 48 divisors (see below), whose sum is σ = 3892075488. Its totient is φ = 370355200.

The previous prime is 1389429401. The next prime is 1389429421. The reversal of 1389429420 is 249249831.

It is a super-2 number, since 2×1389429420² = 3861028226323072800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1389429421) 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, 218932 + ... + 225188.

It is an arithmetic number, because the mean of its divisors is an integer number (81084906).

Almost surely, 2^1389429420 is an apocalyptic number.

1389429420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1389429420 is an abundant number, since it is smaller than the sum of its proper divisors (2502646068).

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

1389429420 is a wasteful number, since it uses less digits than its factorization.

1389429420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9970 (or 9968 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 1389429420 is about 37275.0509053978. The cubic root of 1389429420 is about 1115.8663044322.

The spelling of 1389429420 in words is "one billion, three hundred eighty-nine million, four hundred twenty-nine thousand, four hundred twenty".