402140430 has 32 divisors (see below), whose sum is σ = 1072375200. Its totient is φ = 107237376.

The previous prime is 402140411. The next prime is 402140437. The reversal of 402140430 is 34041204.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402140437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 744435 + ... + 744974.

It is an arithmetic number, because the mean of its divisors is an integer number (33511725).

Almost surely, 2^402140430 is an apocalyptic number.

402140430 is an abundant number, since it is smaller than the sum of its proper divisors (670234770).

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

402140430 is a wasteful number, since it uses less digits than its factorization.

402140430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489425 (or 1489419 counting only the distinct ones).

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

The square root of 402140430 is about 20053.4393558811. The cubic root of 402140430 is about 738.1181977385.

Adding to 402140430 its reverse (34041204), we get a palindrome (436181634).

The spelling of 402140430 in words is "four hundred two million, one hundred forty thousand, four hundred thirty".