402022040 has 32 divisors (see below), whose sum is σ = 1033771680. Its totient is φ = 137836032.

The previous prime is 402022009. The next prime is 402022091. The reversal of 402022040 is 40220204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 717617 + ... + 718176.

It is an arithmetic number, because the mean of its divisors is an integer number (32305365).

Almost surely, 2^402022040 is an apocalyptic number.

402022040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402022040 is an abundant number, since it is smaller than the sum of its proper divisors (631749640).

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

402022040 is a wasteful number, since it uses less digits than its factorization.

402022040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435811 (or 1435807 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402022040 is about 20050.4872758744. The cubic root of 402022040 is about 738.0457567172.

Adding to 402022040 its reverse (40220204), we get a palindrome (442242244).

The spelling of 402022040 in words is "four hundred two million, twenty-two thousand, forty".