42320235402 has 80 divisors (see below), whose sum is σ = 97544822760. Its totient is φ = 13703893632.

The previous prime is 42320235401. The next prime is 42320235437. The reversal of 42320235402 is 20453202324.

It is a happy number.

42320235402 is a `hidden beast` number, since 4 + 2 + 3 + 20 + 235 + 402 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31400194401 + 10920041001 = 177201^2 + 104499^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42320235401) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4052724 + ... + 4063152.

Almost surely, 2^42320235402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42320235402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48772411380).

42320235402 is an abundant number, since it is smaller than the sum of its proper divisors (55224587358).

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

42320235402 is a wasteful number, since it uses less digits than its factorization.

42320235402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11157 (or 11148 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

Adding to 42320235402 its reverse (20453202324), we get a palindrome (62773437726).

The spelling of 42320235402 in words is "forty-two billion, three hundred twenty million, two hundred thirty-five thousand, four hundred two".