163425440 has 48 divisors (see below), whose sum is σ = 399417480. Its totient is φ = 63114240.

The previous prime is 163425433. The next prime is 163425461. The reversal of 163425440 is 44524361.

163425440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 157452304 + 5973136 = 12548^2 + 2444^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12971 + ... + 22250.

Almost surely, 2^163425440 is an apocalyptic number.

163425440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163425440 is an abundant number, since it is smaller than the sum of its proper divisors (235992040).

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

163425440 is a wasteful number, since it uses less digits than its factorization.

163425440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35265 (or 35257 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 163425440 is about 12783.7959933660. The cubic root of 163425440 is about 546.7303977520.

The spelling of 163425440 in words is "one hundred sixty-three million, four hundred twenty-five thousand, four hundred forty".