1423601920 has 108 divisors (see below), whose sum is σ = 3693015396. Its totient is φ = 525557760.

The previous prime is 1423601869. The next prime is 1423601983. The reversal of 1423601920 is 291063241.

It can be written as a sum of positive squares in 6 ways, for example, as 452157696 + 971444224 = 21264^2 + 31168^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213030 + ... + 219610.

It is an arithmetic number, because the mean of its divisors is an integer number (34194587).

Almost surely, 2^1423601920 is an apocalyptic number.

1423601920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423601920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1846507698).

1423601920 is an abundant number, since it is smaller than the sum of its proper divisors (2269413476).

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

1423601920 is an equidigital number, since it uses as much as digits as its factorization.

1423601920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628 (or 6601 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1423601920 is about 37730.6496100982. The cubic root of 1423601920 is about 1124.9404202192.

The spelling of 1423601920 in words is "one billion, four hundred twenty-three million, six hundred one thousand, nine hundred twenty".