402422440 has 32 divisors (see below), whose sum is σ = 1034801280. Its totient is φ = 137973312.

The previous prime is 402422417. The next prime is 402422443. The reversal of 402422440 is 44224204.

It is not an unprimeable number, because it can be changed into a prime (402422443) 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, 718332 + ... + 718891.

It is an arithmetic number, because the mean of its divisors is an integer number (32337540).

Almost surely, 2^402422440 is an apocalyptic number.

402422440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402422440 is an abundant number, since it is smaller than the sum of its proper divisors (632378840).

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

402422440 is a wasteful number, since it uses less digits than its factorization.

402422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437241 (or 1437237 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 402422440 is about 20060.4695857300. The cubic root of 402422440 is about 738.2906980710.

Adding to 402422440 its reverse (44224204), we get a palindrome (446646644).

The spelling of 402422440 in words is "four hundred two million, four hundred twenty-two thousand, four hundred forty".