402430440 has 32 divisors (see below), whose sum is σ = 1207291680. Its totient is φ = 107314752.

The previous prime is 402430433. The next prime is 402430447. The reversal of 402430440 is 44034204.

It is an interprime number because it is at equal distance from previous prime (402430433) and next prime (402430447).

It is not an unprimeable number, because it can be changed into a prime (402430447) 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, 1676674 + ... + 1676913.

It is an arithmetic number, because the mean of its divisors is an integer number (37727865).

Almost surely, 2^402430440 is an apocalyptic number.

402430440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402430440 is an abundant number, since it is smaller than the sum of its proper divisors (804861240).

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

402430440 is a wasteful number, since it uses less digits than its factorization.

402430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353601 (or 3353597 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 402430440 is about 20060.6689818660. The cubic root of 402430440 is about 738.2955903483.

Adding to 402430440 its reverse (44034204), we get a palindrome (446464644).

The spelling of 402430440 in words is "four hundred two million, four hundred thirty thousand, four hundred forty".