402140320 has 48 divisors (see below), whose sum is σ = 1000067040. Its totient is φ = 152388864.

The previous prime is 402140317. The next prime is 402140327. The reversal of 402140320 is 23041204.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 402140294 and 402140303.

It is not an unprimeable number, because it can be changed into a prime (402140327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63102 + ... + 69181.

It is an arithmetic number, because the mean of its divisors is an integer number (20834730).

Almost surely, 2^402140320 is an apocalyptic number.

402140320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402140320 is an abundant number, since it is smaller than the sum of its proper divisors (597926720).

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

402140320 is a wasteful number, since it uses less digits than its factorization.

402140320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132317 (or 132309 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 402140320 is about 20053.4366132092. The cubic root of 402140320 is about 738.1181304378.

Adding to 402140320 its reverse (23041204), we get a palindrome (425181524).

The spelling of 402140320 in words is "four hundred two million, one hundred forty thousand, three hundred twenty".