402408258 has 64 divisors (see below), whose sum is σ = 1025187840. Its totient is φ = 102511872.

The previous prime is 402408257. The next prime is 402408269. The reversal of 402408258 is 852804204.

It is a happy number.

It is a super-2 number, since 2×402408258² = 323864812213189128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402408257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1266 + ... + 28397.

It is an arithmetic number, because the mean of its divisors is an integer number (16018560).

Almost surely, 2^402408258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402408258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (512593920).

402408258 is an abundant number, since it is smaller than the sum of its proper divisors (622779582).

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

402408258 is a wasteful number, since it uses less digits than its factorization.

402408258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29711.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 402408258 is about 20060.1161013589. The cubic root of 402408258 is about 738.2820251272.

The spelling of 402408258 in words is "four hundred two million, four hundred eight thousand, two hundred fifty-eight".