402423120 has 160 divisors (see below), whose sum is σ = 1512224640. Its totient is φ = 97551360.

The previous prime is 402423089. The next prime is 402423127. The reversal of 402423120 is 21324204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 402423093 and 402423102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402423127) 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, 15292 + ... + 32228.

It is an arithmetic number, because the mean of its divisors is an integer number (9451404).

Almost surely, 2^402423120 is an apocalyptic number.

402423120 is a gapful number since it is divisible by the number (40) 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 402423120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756112320).

402423120 is an abundant number, since it is smaller than the sum of its proper divisors (1109801520).

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

402423120 is a wasteful number, since it uses less digits than its factorization.

402423120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16970 (or 16958 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402423120 is about 20060.4865344787. The cubic root of 402423120 is about 738.2911139171.

Adding to 402423120 its reverse (21324204), we get a palindrome (423747324).

The spelling of 402423120 in words is "four hundred two million, four hundred twenty-three thousand, one hundred twenty".