1423089720 has 384 divisors, whose sum is σ = 5453360640. Its totient is φ = 318504960.

The previous prime is 1423089709. The next prime is 1423089727. The reversal of 1423089720 is 279803241.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423089727) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2466072 + ... + 2466648.

It is an arithmetic number, because the mean of its divisors is an integer number (14201460).

Almost surely, 2^1423089720 is an apocalyptic number.

1423089720 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 1423089720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2726680320).

1423089720 is an abundant number, since it is smaller than the sum of its proper divisors (4030270920).

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

1423089720 is a wasteful number, since it uses less digits than its factorization.

1423089720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1423089720 is about 37723.8614142296. The cubic root of 1423089720 is about 1124.8054893343.

The spelling of 1423089720 in words is "one billion, four hundred twenty-three million, eighty-nine thousand, seven hundred twenty".